How to Coat a Screen for Screen Printing.
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- Опубліковано 2 вер 2017
- In this video tutorial I show you how to coat a screen for silk screen printing by Cam Earven for Monument Limited.
While the screen is drying let's talk scoop coaters.
The edge should be clean and have no chips, show a close up of the good scoop coater.
yea our coater should look exactly nothing like this (show chip on the old coater) See that chip.
These kind of chips will create a dense line we we coat that will be hard to expose.
You can try to use a high grit sand paper to buff the chip out. If that doesn't work the coater should be scrapped.
If you are getting a light colored line when you coat it is because we have dry emulsion on the edge of the blade.
Bringing up the second point thoroughly clean your coater after each use. If you find some emulsion has stuck to the edge and normal water won't take it off use some emulsion remover let it soak and hit it with a scrub pad. In our case I just dunk the coater in our dip tank for a few min then scrub and spray.
Time to coat the screen.
Start by filling the coater about halfway with emulsion. (show close up of filling coater with emulsion.)
start coating on the flat side of the screen.
hold the screen almost vertical like this, and
place the coater on the mesh an inch or so up from the bottom edge.
tip it up slowly and the emulsion will start to move toward the mesh when the emulsion just touches the screen.
apply a firm pressure and pull the edge smoothly up the mesh (Go pro this part.)
As we approach the top tip the the coater back and let the bead of emulsion fall away from the mesh.
when the bead is clear.
pull up another inch and then pull the coater away.
Spin the screen and repeat.
When we are done coating I use my finger to scrap the unused emulsion back into the container. All if these chemicals are expensive so save what you can.
Now we can place the screen in the rack flat side down.
We let it dry this way so that the bulk of emulsion moves to the flat side of the screen.
A thicker stencil on the face of the screen will lay more ink onto the substrate.
Let the emulsion dry in a dust free dark environment.
Most manufactures recommend 24 hours but in the blistering arizona heat 4 hours is just fine.
If you're in a colder or humid climate you may want to stick 24 hour dry times.
Thats a wrap on coating a screen.
In our next video I will show you how to burn and expose a screen.
like, subscribe, and ding the bell so you're notified when I upload. And if you really like the video share it on your social media.
That's it for me. Take care print fam peace out….throw camera up and catch by the lense.
Tags
how to coat a silk screen for t shirt printing
Visit our web site for the best screen printing prices www.monumentlimited.com
Facebook: / monumentltd
Cam Earven:
Instagram: / camearven
Twitter: / camearven
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I cannot wait to start getting equipment. I've been doing vinyl decals for 2.5 years now but I'm getting excited like a kid in a candy store over the idea of screen printing. These videos are a huge motivation and filled with great knowledge I need.
Right on thank you so much for watching the videos. Screen printing becomes an addiction.
Thank you brother so much, your vids, tips, and general cheeriness are guiding me through this process. Love!
Another super helpful video. Going to share with my students. Thanks!
LOL That intro almost made me drop my laptop! Thanks for not being boring at 6 am! :)
I've watched several of your vids trying to troubleshoot emulsion issues. Yours are the best. I like your delivery and sense of humor (one must have humor if you're going to try this at home kids.) Hoping my 3rd try is the charm:))
Thanks!! Great video easy to follow...
Great demonstration!!
EXCELLENT JOB explaining the process. Simple, detailed and straight to the point! We everyone on UA-cam explained things as well as you.
I work for a company that sales ink, coasters, screens ect etc. So, I am now a subscriber!👍😁
Loving these videos man, keep them up
you're a legend these videos are insane man
Liquid dnb goes really well with this vid lool I accidentally discovered this. Also thank you, I had some questions but this vid covered em all.
This helps a lot, nice video!
Thanks for the video!
Thanks, it’s useful and clear 👍
You got me with your opening!
Thanks a lot man! Right to the point
Good job
great video. just subscribed. starting my shop and this helped!
great shirt btw
Dope video.
That intro made me laugh so hard !! :-D Thanks for this video, very good advice !
Great vid - only thing i'd say is some peoples air compressors may have oil in the air, as the pistons are lubricated.
Cam, which emulsion do you use? Thanks!
I'm the 500th "like" lol. Thanks for the tips. Definitely taking these actions my routine.
your awesome bro
Very TOP
By chance, do you have a list of products that you recommend as far as degreasers, emulsion, screens, and equipment
We have a few suppliers now, but I’m always interested in the products that I see in the tutorials and videos, I’m always down to try new products out to see if they compete or are far better than the ones I have now
For smaller screens do you coat both the inside and outside?
On smaller screens (used for hats, masks, etc.) I’ve only ever coated the outer (flat) side.
I'm your new subscriber 😁😁😁😁
Do you coat lower mesh size 2/1. One coat outside and two inside on the squeegge side?
What’s a typical drying time, in say, a room with 40% humidity? Is a fan a good idea? Thanks!
What is your preferred time to let screen dry or do you let it sit til it's dry to the touch
Is there a maximum drying time for using a screen that has drying emulsion on it?
How often should you redo the emulsion even if its the same image you’ve got on it?
subscribing for the intro alone
I've seen other videos where they coat both sides, and then go back on the flat side and do one more pass where it seems like they're taking off some that pushed through from the coating on the inside. This is what I've followed in my attempts, but when spray off the emulsion after exposing, I'm running into an issue of my exposed emulsion basically deteriorating from my image. Essentially, the image is starting to come through as I spray it off, but once I get down to the final pieces needed to come off for some of the details, bigger chunks than I want are coming apart.
I don't know if I have junk emulsion? I'm using ULANO QTX since I saw online it was a good "Beginners Emulsion"... After about 20 failed attempts, I'm beginning to question two things, if the emulsion itself is bad or if the 3rd pass (2nd pass on the flat side of the screen) is what's screwing me up. Any insight? Does water temperature have anything to do with this? I feel like I heard one video say use cold water, but in Los Angeles, my garden hose water does not seem to get that cold in these hot summers. :(
PS. I purchased that exposure calculator to help me get my expose time correct, and so far, I think my expose time is about right.
I’ve been having issues of the emulsion dripping after I’m done applying to the screen. Been told that I’m not applying hard enough, any tricks to knowing how much pressure to use to get it to apply correctly?
Can I use the squeegee for coating emulsion ?
so there are many different sizes for the emulsion coaters. i see you use a coater everytime thats pretty much the width of the screen. is this to make life easier or your prefrence. also does the coater ever damage the screens edges when coating with the metal to screen contact.
exactly. I like a coater that is as close the mesh size as possible. This way you use less tape to mask the openings around the edges.
Hello. Nice video, very informative. However I have one question. Could one coat a screen with a squeegee?
For sure, it will be messy and the screen wont be coated well but if you a hobbiest just messing around it will get the job done, I have a video that shows me doing just that.
@@ThePrintLifeThank you
two thumbs up ...
I noticed that you do not coat in a dark room. Is it necessary or do we only need a dark room for the drying? How long do we dry for. 🙏🏼
Have trouble putting emulson on a 25 mesh screen
Cam, how did you set up your monster max? I tried everything (1,2,3,4 pieces of tape)and can't get a good coat. Leaves thick beads on edges and goops in corners...all of which I have to scrape. I tried almost every possible set up. I'm perfect with the conventional coater, but this one...grrr!
Haha yup. that coater is shit, we have the same damn problem with it. I use the glass on the exposure unit to get a the sides flush and tighten the screws. the classic coater with the plastic ends is way better.
By the way did you submit a request to The Print Life group on facebook?
hey ... any ideas of what kind of light i should have when coating screens, because currently i am doing it in the dark ... i heard use a yellow bulb .. is this right ? .. thanks in advance :)
For sure yellow bug lights work great,
how many min. we let it to dry
Can a screen still work when placed upside down??
How long should it dry?
Could ya use LED bulbs in the darkroom since they give out no UV light? Does daylight affect emulsions quickly, or would it take some time to affect them. We have a light safe box for storing them as they dry, just wondering more so in the coating part of the job
oh and thank you in advance if you have the time to reply.
Shane that is a great question. I dont have any experience with LED lights. I would assume they produce some uv, but how much is a mystery to me. If you find out be sure to let me know in the comments. If not I will be looking into it.
Thanks for the reply. Well I have installed two warm white LED (7 watt=60) bulbs into the room so I will for sure give you an update on that. Just seems more preferable than working in that dull yellow light which most do. They are way more energy efficient too which means cheaper electric bills! Your channel is fantastic by the way, love the how to vids, right to the point and well edited! Keep it up man!
Shane Bowers - the yellow sleeves that go over fluorescent bulbs is plenty of light. They make exposure units now with LED's...I assume they might cause some issues. I have 2 lamps with bug lights that's plenty. I've left my shop lights (4' fluorescent lights) on when working with fresh screens and emulsion and had no issues, but I'd rather be safe then sorry! I read somewhere that overhead shop lights will take at least an hour to have even the littlest effect...but I haven't tested that yet :)
Shane Bowers - please do keep us informed. Maybe coat a small part of a screen with a small image, out it on foam with a piece of glass over it and let it sit for like 2-3 hours and see what happens :)
What size screens are you using
Yea i need to learn how to expose. Done like 12 different test and only like 2 came out almost 99 percent perfect using a 250w bulb and some cases, the sun. But then again im using diazo green emulsion. Think i might change the type of emulsion i use. Which one do you typically use
Modehfyable Same here. Built an exposure unit from scratch then spent months exposing screens trying to find the right number of seconds to expose them at. No printing mind you, just exposing reclaiming, coating and exposing again. All in my spare time but still time consuming.
Modehfyable - diazo is way more forgiving. If you expose an extra 30 seconds with diazo style emulsion, you'll be ok, but if you expose an extra 30 seconds with photopolymer, your screen will be over exposed. What issues are you having? Image and emulsion washing out, or emulsion not washing out of the image area?
have to wash out image for a while and when it finally shows it gets to a point where it either completely falls apart or i lose a good amount of detail on the image. but now it usually falls apart. ive tried the sun for30sec to 3min, 30sec is usually almost perfect but not sure if its not 100percent perfect because i have a glass over the image during exposure. and as for the 250w bulb, sometimes 12min is fine, sometimes 15min, sometimes 10min. it seems simple to do but yet i cant find the magic number. i might change my emulsion kit to a different brand
Yea man it sounds like you may have a fairly transparent film, combined with the diazo base emulsion you are going to have a hard time because diazo based emulsions take for ever to expose especially with a crappy light source. I would use the sun becouse it has the highest concentration of uv light. Photopolymer emulsions are super uv sensitive and will expose faster then diazo so that may help with your issue. But what I always recommend is just buy Dual Cure emulsion. its the best general use emulsion.
The Print Life ill check it out then.. which specific emulsion brand/name do u recommend for the emulsion because this speedball diazo kit is making me lose my mind lol
How long do you let it dry I’m not using a fan either
12-24 hours is optimal. The rule in our shop is you always start the day by reclaiming or “washing out” screens (if needed). Then end the day with coating screens so they’re allowed to dry overnight. I will say though that I have gotten caught in an extreme rush order that was do or die and let it dry in dark room with fan for about 2 hours and made it work. I think the key was not using as much pressure while washing it out after exposing (used the mist setting up close on design instead of a powerful stream setting).
How can one create a dust free area? I am currently in the garage and notice dust on almost everything.
Ahha so hard to do. gotta have filters and what not. just coat the screens as soon as they are dry and you should be good. Dont complicate things to much.
Yea man we got it to, it a nightmare, that I why we coat as soon as the screens are dry,
I suck at coating. I have a scoop coater, but I can never get a one swipe even coating.
Same
Emulzhion / Emulsion
Potato, Potahto
Anyway... nice, neat job. You clean EVERYTHING.
Most guys are in such a hurry, that screens & scoop coaters get destroyed
because they won't take the time to properly degrease, and clean up when they're done. Then, material
& tools have to be replaced prematurely. Not to mention when you're ready to burn, only to discover
that your screens aren't usable because someone coated dirty screens, with contaminated emulsion,
with a jacked-up coater. Off-the-chain aggrevating, cuz you gotta get that printed NOW. And when it
comes to deadlines... customers are brutal & don't wanna hear it. "You said #@&$@#!"
It's such a simple concept. Anything worth doing, is worth doing the right way.
What kind of emulsion do you use?
We use all kinds, at the moment we are using marukami t9
how long you wait for it to dry?
24 hours is recommended but we have gotten away with an hour.
The rule in our shop is you always start the day by reclaiming or “washing out” screens (if needed). And end the day with coating screens so they’re allowed to dry overnight. I will say though that I have gotten caught in an extreme rush order that was do or die and let it dry in dark room with fan for about 2 hours and made it work. I think the key was not using as much pressure while washing it out after exposing (used the mist setting up close on design instead of a powerful stream setting).
Is it okay to apply the emulsion in a decently lit place, like in the video, as long as it's left to dry in a dark space?
I do and have never had any issues with it. Definitely need to see that your getting a good even layer with your scoop. Just make sure its drying in as dark a place as possible 🤙🏼
I was doing it so much differently xd
Tried to coat screens yesterday. I don't think I pressed hard enough. It dripped off all over the drying rack
May have just applied it too thick
anyone have any idea why when i go to wash out my screen after exposing. the image that wasn’t burned becomes bubbly in a way and i end up having to peel my image instead of it washing out nicely
I keep having big drip spots of emulsion on my screen once it dries...i lay it face down so the excess can drip off but it leaves big blots of emulsion..do i need to switch emulsion?
you probably just use waaay too much emulsion
Take a second...Flood Rinse both sides too!!
DATS ME I'M A SCREEN
HELP I coated the screen and I had runs and drops marks.
It just takes time to develop the knack for it. You will be coating smooth as butter after 20 screens or so.
kinda looks like Shia lebouf
Not how I spread a screen my friend,