The difference between vinegar and coke is that coke contains gum arabic, and therefore is closer to etching solutions used in stone litography. I believe the gum arabic protects the hydrophilic parts of the plate during the etching. Anyway, thank you for the gorgeous and informative video!
Excellent! Yes, thank you! I was guessing about all of this and I appreciate you offering your knowledge here. Thank you also for being so kind about my video.
I'm no chemist, but I've noticed the cola has phosphoric acid in the ingredients. In some aluminum plate videos, they use phosphoric acid with the gum arabic.
Totally! I know that TAPEM for aluminum plate etching uses phosphoric. It's still surprising to me that a thin sheet like aluminum foil still works under similar conditions. (I'm no chemist either)
Worth trying, I mean we do etch a litho stone before the dissolve/rub up part so that logic makes sense. If I get back to this process some time soon, I'll get that a go.
It should, my understanding is that the cola's ingredients react to the aluminum. We used foil because a lot of people watching the video didn't have access to aluminum plate. I would try it, if you don't have traditional chemistry like TAPEM or Gum Arabic.
can you use normal oil ink for oil paintings? what are the alternatives to the expensive and bulky (at least in my country) litho/relief ink? What can you draw the image with?
Hmmm. I've never tried it but I am going to guess at what may happen. The oil-based ink often has waxes and driers and other additives that condition it for an even drying time and helps it roll out. Oil paint is likely to have a different combination of wax/oil/pigment/additives so it's likely to behave differently. You can buy small tubes of oil-based ink if it's just the size. Since lithography-especially Kitchen Litho-is so fussy, introducing new variables may make things difficult. That said, if you try it and it works, then maybe it's doing something better than oil-based printmaking ink does. Long way of saying I don't know but I have doubts.
It can work because it removes grease that would potentially show up in the print. I've done it with wiping before and without, so I don't think it's necessary. I was following someone else's tutorial on that one. Plenty of people don't so I don't think it's 100% needed
@@twinbeepress , I really appreciate you and others for sharing your experimentation and knowledge on this, and for further taking the time to answer questions. Great video, and it certainly goes to show I don't really understand why this process works as I thought the grease pen was a resist for the acid. Regardless, I pulled a couple of pretty terrible prints tonight, but it worked more or less and it was awesome! Thanks to your videos. I'll keep experimenting - trying to turn this into a high school metal shop class project. Cheers!
@@markv3559 thank you! I have failed a lot at this, i just didn't record it. I know some people have better luck with sharpie pens, so that may be worth trying. Best of luck.
Thanks for the video ！I tried many ways ,also failed many times. All of them just worked well at first print .Actually,cola seems doesn’t work for me.😂
Oh no! My students had mixed success too, meaning lots of failures. I couldn't get sharpie to work,so I used litho crayons, yet all of them said sharpie or permanent marker was the best, most reliable. If you haven't tried it yet, maybe sharpie will do it
The difference between vinegar and coke is that coke contains gum arabic, and therefore is closer to etching solutions used in stone litography. I believe the gum arabic protects the hydrophilic parts of the plate during the etching. Anyway, thank you for the gorgeous and informative video!
Excellent! Yes, thank you! I was guessing about all of this and I appreciate you offering your knowledge here. Thank you also for being so kind about my video.
I'm no chemist, but I've noticed the cola has phosphoric acid in the ingredients. In some aluminum plate videos, they use phosphoric acid with the gum arabic.
Totally! I know that TAPEM for aluminum plate etching uses phosphoric. It's still surprising to me that a thin sheet like aluminum foil still works under similar conditions. (I'm no chemist either)
Would it work better if you did the etch before you used the oil to dissolve the image?
Worth trying, I mean we do etch a litho stone before the dissolve/rub up part so that logic makes sense. If I get back to this process some time soon, I'll get that a go.
Hi....can we use direct aluminium plate,instead of using aluminium foil? Will that work?
It should, my understanding is that the cola's ingredients react to the aluminum. We used foil because a lot of people watching the video didn't have access to aluminum plate. I would try it, if you don't have traditional chemistry like TAPEM or Gum Arabic.
Flashing!
can you use normal oil ink for oil paintings? what are the alternatives to the expensive and bulky (at least in my country) litho/relief ink? What can you draw the image with?
Hmmm. I've never tried it but I am going to guess at what may happen. The oil-based ink often has waxes and driers and other additives that condition it for an even drying time and helps it roll out. Oil paint is likely to have a different combination of wax/oil/pigment/additives so it's likely to behave differently. You can buy small tubes of oil-based ink if it's just the size. Since lithography-especially Kitchen Litho-is so fussy, introducing new variables may make things difficult. That said, if you try it and it works, then maybe it's doing something better than oil-based printmaking ink does. Long way of saying I don't know but I have doubts.
Wait... you wipe before etching? How does that work?
It can work because it removes grease that would potentially show up in the print. I've done it with wiping before and without, so I don't think it's necessary. I was following someone else's tutorial on that one. Plenty of people don't so I don't think it's 100% needed
@@twinbeepress , I really appreciate you and others for sharing your experimentation and knowledge on this, and for further taking the time to answer questions. Great video, and it certainly goes to show I don't really understand why this process works as I thought the grease pen was a resist for the acid. Regardless, I pulled a couple of pretty terrible prints tonight, but it worked more or less and it was awesome! Thanks to your videos. I'll keep experimenting - trying to turn this into a high school metal shop class project. Cheers!
@@markv3559 thank you! I have failed a lot at this, i just didn't record it. I know some people have better luck with sharpie pens, so that may be worth trying. Best of luck.
I will definitely try this
Thank you! This actually worked well. I'm just having trouble reprinting...
What trouble are you having? I'll do my best to diagnose
Thanks! Nice
Thanks for the video ！I tried many ways ,also failed many times. All of them just worked well at first print .Actually,cola seems doesn’t work for me.😂
Oh no! My students had mixed success too, meaning lots of failures. I couldn't get sharpie to work,so I used litho crayons, yet all of them said sharpie or permanent marker was the best, most reliable. If you haven't tried it yet, maybe sharpie will do it
@@丸金-l7m Excellent! I'm glad the sharpie worked for you. I should probably update the video.
Patrick Vincent Great, I'm looking forward to your new videos！