Smart Tint Vs Switchglass
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- Опубліковано 5 жов 2024
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Smart Tint Vs Switchglass
OK - I’m going to demonstrate why Smart Film is not an ideal situation.
I have a piece of Smart Film here and what I’m going to do is I’m going to peel the liquid crystal film apart - I’ve already split it here, but as I’ve peeled it apart you can see where I’m pointing here, this is where the liquid crystal is supposed to be solid. What happens is because switchable film is very moisture-sensitive, you can see that as it’s come apart it’s actually started to come away from the plastic and this is not a good thing. So we can see that when I’ve peeled the switchable film apart from this corner you can see that the liquid crystal density has really come away to the point that it is clear. Now, this is an older piece that’s been exposed externally for approximately 12 months. What I’m going to show you now is a fresh piece of switchable film and this switchable film is brand new from production - it’s less than 2 weeks old. And I’m going to do the same thing - I’m going to basically split the film in half so that we can see the liquid crystals. As I pull this apart what we can see is that there’s great consistency in the liquid crystals. There are no liquid crystals that have come apart - they’re all very, very dense apart from where I have peeled it here - there is a little bit - but this is very, very dense. So I’ll put the two up next to each other.
Now the switchable film once its laminated between 2 pieces of glass then it stops degrading because it is not exposed to the environment. But with switchable smart film, the smart film is external and it’s not protected and that’s why when the humidity gets to it this is what happens. So what we can see are the 2 different films - the one on the right is literally clear, there’s no liquid crystals when I peeled it apart because they’ve degraded over the last 12 months because it’s been external. Then I have a piece of Switch film to the left and the liquid crystals, even though I’ve torn them both apart down the middle - I’ve basically split them - so you can see the liquid crystals inside - the liquid crystal density is very, very good and what will happen is, for example, this piece of film once it is laminated it will stop degrading where the film - if I peel this completely apart - that’s 2 halves of a piece of switchable and you can see that the density is really, really good.
For one last time let’s look at how bad this is. This is what happens when the film degrades - the liquid crystals start to basically come away and this affects performance. This is why we don’t recommend the Smart Tint.
Smart Tint vs Switchglass - What is the difference?
• Smart Tint is a film that can be retrofitted (stuck on) to the surface of your existing glass.
• Switchglass is a ready-to-glaze product that incorporates a switchable Polymer-Dispersed Liquid Crystal film carefully laminated between two pieces of glass.
There are many promotional videos on the internet showing Smart Tint being easily installed in just a few minutes. These videos clearly over-simplify the process. Handling switchable film (even in the form of Smart Tint) requires considerable skill and experience. If the film is creased, bent or bruised it will damage the liquid crystals inside leaving a clear patch where the damage occurs. Our technicians need a minimum of six months training in the handling, wiring and laying-up of switchable film for lamination and our clean room (a totally dust-free environment) is monitored to ensure quality handling is achieved and optimum standards are met at all times.
It should be noted that a number of years ago, with the possibility of marketing these self-adhesive DIY switchable films ourselves, we tested a number of them (including Smart Tint), but based on the results all were rejected.
A Case in Point - and the reason we felt the need to speak up about this DIY product
Why didn’t you use 12 month old switchglass? to make it an even test ?
Sean, as our film is designed to be laminated. Typically this is about 10-15 days from the time it is produced. We do hold stock in a climate controlled room with a 10%RH (so very low moisture) where it is kept for no longer than three months. Once it is laminated is stops degrading as it is no longer exposed to moisture. With retrofitted PDLC it is exposed externally to the elements and this is why it does not have a very long lifespan. It any PDLC film is exposed to the elements for 12 months then the outcome would be the same. This demo is to show what happens when it is not laminated.
Switchglass it is still not an even test I'm not even bothered about it much just always have an even test
Sean thank you for your keen interest, we value your thoughts on how we test and review products. We will certainly take on board your thoughts for our next review.
Switchglass you are obviously 100% bias! Most anything 2 weeks out of the factory will preform better than it's counterpart that was left outside to the elements for a year. Both products need to have undergone time exposed to whatever elements. If this is your testing and reviewing process I'd be worried about the integrity of any product you release. Boasting a 2 week, "factory fresh" product is better than a one year weathered product is just asinine.
Brian, we are able to sell this product as well and it would have a far greater margin for us. However, our test over the last decade along with our partners around the world support the product not being very reliable. The reason this video was made was that we replaced an entire project which had Smart Tint installed due to the customer being disappointed with the quality and performance of it.
Here's the article below if you are interested:
Smart Tint vs Switchglass - What is the difference?
• Smart Tint is a film that can be retrofitted (stuck on) to the surface of your existing glass.
• Switchglass is a ready-to-glaze product that incorporates a switchable Polymer-Dispersed Liquid Crystal film carefully laminated between two pieces of glass.
There are many promotional videos on the internet showing Smart Tint being easily installed in just a few minutes. These videos clearly over-simplify the process. Handling switchable film (even in the form of Smart Tint) requires considerable skill and experience. If the film is creased, bent or bruised it will damage the liquid crystals inside leaving a clear patch where the damage occurs. Our technicians need a minimum of six months training in the handling, wiring and laying-up of switchable film for lamination and our clean room (a totally dust-free environment) is monitored to ensure quality handling is achieved and optimum standards are met at all times.
It should be noted that a number of years ago, with the possibility of marketing these self-adhesive DIY switchable films ourselves, we tested a number of them (including Smart Tint), but based on the results all were rejected.
Pros and Cons of Smart Tint
Pros:
DIY
Cheap
Cons:
No warranty support
Easily damaged during installation
Low clarity
Limited lifespan
When cutting or trimming to size the edges are easily damaged
A Case in Point - and the reason we felt the need to speak up about this DIY product
We were recently approached by a disgruntled customer of DIY Smart Tint. The following is a rundown of the customer’s unfortunate and costly mistake in choosing Smart Tint over Switchglass.
Their Smart Tint arrived rolled up and packed into a box which contained all the equipment; the film was approximately cut to size for each of the windows. The client’s Project Manager organised a local tinter to install the Smart Tint using the instructions provided. After the installation the client commented that the film was not very clear, with an unacceptably high level of haze. He also commented about the edges being slightly damaged and bubbles visible in the film.
Overall, the customer was definitely not satisfied with the outcome. The Project Manager communicated the customer’s dissatisfaction with the Smart Tint supplier and was given some tips on how to improve the clarity, i.e. by ramping up the voltage to the Smart Tint (this is not a good idea as it can damage the sensitive PDLC film and shorten its lifespan). This did temporarily improve the clarity, but the transformer could only run the Smart Tint for 2-3 minutes before shutting off, then needing 10 minutes to cool before starting up again.
After being initially responsive to the Project Manager’s needs the Smart Tint supplier then ceased further communication for no apparent reason. Now the Project Manager is looking to start legal action against them. This will be challenging as the supplier is located in the United States and he is in Australia. The customer concluded that the performance of the Smart Tint (and the lack of follow-up support) was unacceptable.
We were approached and we met with all the stakeholders. Upon testing our sample and witnessing the results, their response was that the “Switchglass was much clearer than the Smart Tint”. At the end of the meeting it was agreed that the Smart Tint and glass would be removed and our Switchglass installed in its place.
Caveat Emptor - let the buyer beware
This has been a very costly exercise for the customer who has spent nearly double the amount of what it would have cost to have Switchglass installed in the first place.
We will have some updates coming from this case study shortly as the replacement installation has not yet taken place. We will have a video, pictures and interviews with the customer, Project Manager, builder and architect. Our aim is to provide relevant information that will assist all parties and future customers in making an educated decision.
In conclusion, Smart Tint may seem like an attractive option due to its promoted ease of installation and low cost, but we advise caution - as the above scenario clearly demonstrates.
Not a like for like comparison. Comparing a 2 wk old film to a 12 month old film is not informative. Why not have both pieces 12 mos old!?
Denise, we have a great deal experience with PDLC film and understand how it works on many levels. Our film is designed to be laminated. Typically this is about 10-15 days from the time it is produced. We do hold stock in a climate controlled room with a 10%RH (so very low moisture) where it is kept for no longer than three months. Once it is laminated is stops degrading as it is no longer exposed to moisture. With retrofitted PDLC it is exposed externally to the elements and this is why it does not have a very long lifespan. It any PDLC film is exposed to the elements for 12 months then the outcome would be the same. This demo is to show what happens when it is not laminated. If you have some technical information you'd like to share please feel free to do so. Thanks
Dislike for failed logic. Not a true comparison. Do a video with both products at 12 months.
David, as our film is designed to be laminated. Typically this is about 10-15 days from the time it is produced. We do hold stock in a climate controlled room with a 10%RH (so very low moisture) where it is kept for no longer than three months. Once it is laminated is stops degrading as it is no longer exposed to moisture. With retrofitted PDLC it is exposed externally to the elements and this is why it does not have a very long lifespan. It any PDLC film is exposed to the elements for 12 months then the outcome would be the same. This demo is to show what happens when it is not laminated.
The reason for not having the PDLC out in the open is that it utilizes water-soluble polyvinyl alcohol to disperse liquid crystal droplets and is called Emulsion Technology or Nematic Curvilinear Aligned Phase (NCAP) technology.
In general term Microdroplet Display or LCMD which are LC switchable films invented over a quarter of a century ago have these features. They should be laminated between glass to prevent absorption of moisture from the air.
Do you have resellers in Europe?
Hey mate, this product doesn't look diy or consumer friendly. Do you have any products where you can apply the film on yourself? I'm totally keen on doing a camper van and retrofitting the existing windows however your video raises a good point on degradation. It seems the competitor had a more consumer friendly approach initially however the end result may not be favourable
You are correct that our product requires a level of expertise with regard to having it installed by a licenced electrician as well as a qualified glazier.
The film which you can apply and DIY yourself more users friendly but comes with it's own pitfalls. If you are ok with limited warranty and you accept that it has limitations with regards to its longevity then this may be an option.
For me even though we could have sold a truckload of this film globally as there are less barriers to sending a piece of film vs an entire panel of glass I'm not comfortable that the manufacturers of the stick on film will not offer any warranty of any description on their products and those who do dont always support you if something goes wrong.
All the best regards Roman Watkins
hey mate. im thinking the same for our van. did you end up using the smart tint on your van?
Well you’re hardy meant to split the film apart.
I’d imagine it would damage the liquid crystal when you remove it from its protective layer…
I wish I had tried Switchglass intead of Smart Tint. Smart Tint was great and responsive in order to make the sale. Then when I experienced an issue and reached out for some assistance on troubleshooting, I received a terrible response. They accidentally left an internal email from John Adams in their response to me which directed the person who seemed willing to provide some sort of assistance "don't waste time with this guy" "if he likes he can purchase engineering time at 350 per hour" with a 2 hour minimum.
And then they stopped responding to me.
Smart Tint is the worst company I have personally dealt with for customer service in MANY years. It doesn't matter how good a product is if they don't stand behind it.
Notcranium, I am sorry for the issues you experienced with using Smart Tint. Our customer Thalanyji which is a not for profit organisation experienced a similar situation to yours. I wrote an article about this last year that I have copied below, it's terrible that these type of rogue operators can do this without some type of repercussions to their business.
If we can help in any way I am happy to offer you a cost plus 10% to restore your faith that some of us actually do care about our customers. My personal email is roman@switchglass.com.au feel free to reach out and I will do what I can to help.
All the best Roman Watkins CEO
Switchglass
Smart Tint vs Switchglass - What is the difference?
www.linkedin.com/pulse/smart-tint-vs-switchglass-what-difference-roman-watkins/
A Case in Point - and the reason we felt the need to speak up about this DIY product
We were recently approached by a disgruntled customer of DIY Smart Tint. The following is a rundown of the customer’s unfortunate and costly mistake in choosing Smart Tint over Switchglass.
Their Smart Tint arrived rolled up and packed into a box which contained all the equipment; the film was approximately cut to size for each of the windows. The client’s Project Manager organised a local tinter to install the Smart Tint using the instructions provided. After the installation the client commented that the film was not very clear, with an unacceptably high level of haze. He also commented about the edges being slightly damaged and bubbles visible in the film.
Overall, the customer was definitely not satisfied with the outcome. The Project Manager communicated the customer’s dissatisfaction with the Smart Tint supplier and was given some tips on how to improve the clarity, i.e. by ramping up the voltage to the Smart Tint (this is not a good idea as it can damage the sensitive PDLC film and shorten its lifespan). This did temporarily improve the clarity, but the transformer could only run the Smart Tint for 2-3 minutes before shutting off, then needing 10 minutes to cool before starting up again.
After being initially responsive to the Project Manager’s needs the Smart Tint supplier then ceased further communication for no apparent reason. Now the Project Manager is looking to start legal action against them. This will be challenging as the supplier is located in the United States and he is in Australia. The customer concluded that the performance of the Smart Tint (and the lack of follow-up support) was unacceptable.
We were approached and we met with all the stakeholders. Upon testing our sample and witnessing the results, their response was that the “Switchglass was much clearer than the Smart Tint”. At the end of the meeting it was agreed that the Smart Tint and glass would be removed and our Switchglass installed in its place.
Caveat Emptor - let the buyer beware
This has been a very costly exercise for the customer who has spent nearly double the amount of what it would have cost to have Switchglass installed in the first place.
We will have some updates coming from this case study shortly as the replacement installation has not yet taken place. We will have a video, pictures and interviews with the customer, Project Manager, builder and architect. Our aim is to provide relevant information that will assist all parties and future customers in making an educated decision.
In conclusion, Smart Tint may seem like an attractive option due to its promoted ease of installation and low cost, but we advise caution - as the above scenario clearly demonstrates.
I'm looking to put something like this on a 2012 Charger with a split zone setup so I can completely darken the rear windows and back glass separate from the front 2 windows which are more often subject to tint regs. How complicated would that process be, what pricing estimate would I be looking at, and where would I need to take it for installation? (Midwest region would be nice if there's a facility.)
Your glass looks great but is’t Affordable for Common person like me where can we get a quote
Hi Edgar, Smartglass/Switchglass has come down in price over the last 10 years making it more much more affordable now that it is more widely used. Please feel free to email us on csteam@switchglass.com.au with your requirements and we will be able to give you a quote. Thank you for your interest.
Wow, this is the height of *marketing BS.* These are the *same exact product.* I'd wager they're from the same supplier and made in the same factory. One gets laminated to/between glass and the other is just applied to the glass. In "both/either" case, the liquid crystal is dispersed in a liquid polymer then sandwiched between clear electrodes and cured to a state where the polymer is solid and the liquid crystal remains liquid, dispersed in the now solid polymer like oil droplets in salad dressing. When you laminate, oh I don't know, say _Reynolds wrap,_ between two sheets of glass you may get a better or more suitable finished product, but it doesn't _cease to be_ Reynolds wrap and become a new, superior product, solely by virtue of the lamination and glazing process.
Hi Waffle Staffel, thanks for your comment. Everyone is welcome to share their thoughts and of course, I am happy to answer any relevant question that may bring some value to other viewers or subscribers of my channel. Maybe this explanation would be more detailed for you which pertains to the longevity of the different PDLC products and their life expectancy.
Firstly the products tested did not come from the same factory. There are a few different answers to that may help you and I will cover off on those more to elaborate on the different evolutions of each of the PDLC products that have been developed over the last 25 years. Waffle Staffel the other consideration is where it is located, internal and or external (direct sunlight or indirect sunlight), and how often it is in use.
Let’s start with the assumption that all these products are being laminated by qualified companies using quality products and that the longevity of each of the compared PDLC products’ evolutions is not compromised by this part of the process. Another consideration is the electrical components: the quality of busbar application and what materials are being used. The reason I mentioned this is that if it is not done properly then UV cracking can occur due to the silver paste (a material used in the process) causing the panel to fail prematurely. Side note: the silver paste is used for PCB (Panel Circuit Boards) and is not designed to be used externally (needs to be out of direct sunlight).
Now to start with a summary of the various Evolutions of the available products. Evolution 1. This First generation, US Patent 4435047, patent expired) utilizes water-soluble polyvinyl alcohol to disperse liquid crystal droplets and is called Emulsion Technology or Nematic Curvilinear Aligned Phase (NCAP) technology.
Evolution 2, the Second generation, ( US Patent 4688900, patent expired) utilizes epoxy to disperse liquid crystal droplets and is called Polymer Dispersed Liquid Crystal (PDLC) technology.
Evolution 3. The Third generation ( US Patent 5270843, still in force) utilizes a non-linear polymer to disperse liquid crystal droplets and is called Non-linear Polymer Dispersed Liquid Crystal Display (NPD-LCD) technology.
A general term for all the above generations is Liquid Crystal Microdroplet Display or LCMD. Both 1 and 2 Evolutions of LC switchable films invented over a quarter century ago have similar features. Evolution 1 and 2 film should be laminated between glass to prevent absorption of moisture from the air. These products are recommended for internal use and if used externally then would need to be double glazed (IGU) into an insulated glazing unit.
So to answer your questions: Evolution 1 and 2 installed internally (no direct sunlight) used daily and being switched off for 50% of the time will last between 15-20 years (remember the caveat to this specified above in paragraph two). Externally, also used daily and being switched off for 50% of the time but double glazed using a high quality soft coat low e glass, it will last between 5-10 years.
However, Evolution 3 product installed internally (no direct sunlight) will last between 30-50 years. Note that this product does not require to be switched off to assist with longevity and can be left on permanently, remember the caveat to this specified above in paragraph two. Evolution 3 product installed externally (note that this product does not need to be double glazed) will last between 20-30 years.
There are not many articles in the world dealing with answers to your question. This is due to the complexity, variations and ongoing improvements in the quality of products out there. Consider the plasma displays which were invented in July 1964 at the University of Illinois by professors Donald Bitzer and Gene Slottow; then came (LCD) in 1972 and LED 1977. The quality of these first generations of products was very poor, however subsequent improvements and developments over time improved their reliability. There are so many different manufacturers of these products that technologies and pricing and fluctuate wildly.
In conclusion: To come up with a fixed rule to encompass every permutation or variance associated with this complex, neo-techno-chemical product is somewhat impossible. Waffle Staffel I have done my best in using the knowledge acquired from working in the industry over the last twenty five years (the latter half as a manufacturer of Switchable glass products ) to give you the best possible answer I hope it’s satisfactory.
Regards
Roman Watkins CEO (Switchglass)
Makes me think you don't rate your product if you don't compare 12 months old with 12 months old?
Hey Robert, thanks for your comment but we not leave our product for 12 months without laminating it. PDLC is very sensitive to humidity and the result would be the same in terms of it degrading, once it is laminated then is is not subjected to the elements such as moisture which would drastically shorten its lifespan.
All this shows is how crappy the adhesive that his company uses is.
"degragading" "degragades" new words.
Put the sellers (especially License Plate Cover sellers!) on blast!
Not sure if it would be legal Marcus :)
Pay attention kids, this is exactly how you dont conduct a science experiment
Hi Dan,
Please feel free to give us your feedback and we will consider in future testing.
Thanks for showing an interest and viewing our video.
Regards
You're comparing apples to oranges! Smart Tint would be installed INSIDE the car. So leaving your square outside in the elements for 12 months and testing against your 'brand new film' that was 'stored in a climate controlled location' is a ridiculous test that has NO value. This is a waste of time. And it does nothing to prove your product's superiority. It only shows you play dirty when comparing your product which makes me not trust you. Shame on you.
Jimmy, we are able to sell this product as well and it would have a far greater margin for us!
However, our test over the last decade along with our partners around the world support the product not being very reliable.
The reason this video was made was that we replaced an entire project which had Smart Tint installed due to the customer being disappointed with the quality and performance of it.
Please share something that might be constructive for our readers, if you note that we try to respond to all questions that are asked of us. The test square was not fitted outside but inside on our office window with no sunlight on it.
Furthermore, the PDLC has a clear conductive layer that needs to be protected from the elements as it will have a reduction in its electrical conductivity over time. This causes a product that has not laminated and or fitted into an IGU to lose this resistance and no longer power the liquid crystals to align at this stage the panel no longer switches into the clear state.
Here's the article below if you are interested:
Smart Tint vs Switchglass - What is the difference?
• Smart Tint is a film that can be retrofitted (stuck on) to the surface of your existing glass.
• Switchglass is a ready-to-glaze product that incorporates a switchable Polymer-Dispersed Liquid Crystal film carefully laminated between two pieces of glass.
There are many promotional videos on the internet showing Smart Tint being easily installed in just a few minutes. These videos clearly over-simplify the process. Handling switchable film (even in the form of Smart Tint) requires considerable skill and experience. If the film is creased, bent or bruised it will damage the liquid crystals inside leaving a clear patch where the damage occurs. Our technicians need a minimum of six months training in the handling, wiring and laying-up of switchable film for lamination and our clean room (a totally dust-free environment) is monitored to ensure quality handling is achieved and optimum standards are met at all times.
It should be noted that a number of years ago, with the possibility of marketing these self-adhesive DIY switchable films ourselves, we tested a number of them (including Smart Tint), but based on the results all were rejected.
Pros and Cons of Smart Tint
Pros:
DIY
Cheap
Cons:
No warranty support
Easily damaged during installation
Low clarity
Limited lifespan
When cutting or trimming to size the edges are easily damaged
A Case in Point - and the reason we felt the need to speak up about this DIY product
We were recently approached by a disgruntled customer of DIY Smart Tint. The following is a rundown of the customer’s unfortunate and costly mistake in choosing Smart Tint over Switchglass.
Their Smart Tint arrived rolled up and packed into a box which contained all the equipment; the film was approximately cut to size for each of the windows. The client’s Project Manager organised a local tinter to install the Smart Tint using the instructions provided. After the installation the client commented that the film was not very clear, with an unacceptably high level of haze. He also commented about the edges being slightly damaged and bubbles visible in the film.
Overall, the customer was definitely not satisfied with the outcome. The Project Manager communicated the customer’s dissatisfaction with the Smart Tint supplier and was given some tips on how to improve the clarity, i.e. by ramping up the voltage to the Smart Tint (this is not a good idea as it can damage the sensitive PDLC film and shorten its lifespan). This did temporarily improve the clarity, but the transformer could only run the Smart Tint for 2-3 minutes before shutting off, then needing 10 minutes to cool before starting up again.
After being initially responsive to the Project Manager’s needs the Smart Tint supplier then ceased further communication for no apparent reason. Now the Project Manager is looking to start legal action against them. This will be challenging as the supplier is located in the United States and he is in Australia. The customer concluded that the performance of the Smart Tint (and the lack of follow-up support) was unacceptable.
We were approached and we met with all the stakeholders. Upon testing our sample and witnessing the results, their response was that the “Switchglass was much clearer than the Smart Tint”. At the end of the meeting it was agreed that the Smart Tint and glass would be removed and our Switchglass installed in its place.
Caveat Emptor - let the buyer beware
This has been a very costly exercise for the customer who has spent nearly double the amount of what it would have cost to have Switchglass installed in the first place.
We will have some updates coming from this case study shortly as the replacement installation has not yet taken place. We will have a video, pictures and interviews with the customer, Project Manager, builder and architect. Our aim is to provide relevant information that will assist all parties and future customers in making an educated decision.
In conclusion, Smart Tint may seem like an attractive option due to its promoted ease of installation and low cost, but we advise caution - as the above scenario clearly demonstrates
There has been a number of comments about this comparison not being equal but because PDLC utilizes water-soluble polyvinyl alcohol to disperse liquid crystal droplets called Emulsion Technology or Nematic Curvilinear Aligned Phase (NCAP) technology, it needs to be laminated between two pieces of glass to ensure longevity.
I want these product in india
That's a pretty big market Kamlesh
Degragating/degragated/degregates..? Sorry but it stole all of my attention.
Not a fair camparison
There has been a number of comments about this comparison not being equal but because PDLC utilizes water-soluble polyvinyl alcohol to disperse liquid crystal droplets called Emulsion Technology or Nematic Curvilinear Aligned Phase (NCAP) technology, it needs to be laminated between two pieces of glass to ensure longevity.
Is it white both of them?? ,,, Oh yeah we don't want them both, we want a black tint ,,, ✌️
This test is such a joke. You cant test a new product, vs one that has been in the elements for months
Especually given the product isn't designed to consistantly be in the elements period. No way I would buy a product with shoddy testing like that
Hi Michael, how would you propose we do our comparison test?
See comment from notcranium on his experiences.
"I wish I had tried Switchglass intead of Smart Tint. Smart Tint was great and responsive in order to make the sale. Then when I experienced an issue and reached out for some assistance on troubleshooting, I received a terrible response. They accidentally left an internal email from John Adams in their response to me which directed the person who seemed willing to provide some sort of assistance "don't waste time with this guy" "if he likes he can purchase engineering time at 350 per hour" with a 2 hour minimum.
And then they stopped responding to me.
Smart Tint is the worst company I have personally dealt with for customer service in MANY years. It doesn't matter how good a product is if they don't stand behind it."