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Topic: Screen printing and Photo emulsion Kinda Tutorial (Image Heavy)  (Read 8835 times)
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petarver
« on: January 14, 2007 04:20:47 PM »

Ok...I thought I would just start this on a fresh post...  Here are the pictures I said I'd post


Photo emulsion fluid....I use a recipe I found on the web.


http://www.goshen.edu/art/DeptPgs/photoemulsion.html

I bought the Potassium Dichromate at a clay arts center.  It's kinda this orange crystally powder.
 You just mix with water and then with elmer's school glue.  Really quite easy.  I then spread it on my screen with a squeegie (work in a dimly lit room, a little light doesn't seem to affect it) and let dry (I speed up the drying process with a regular old fan...no heat.)
While the screen is drying I print or draw my design on a transparency...when  the screen is completely dry I place the screen down on a dark surface...(I use a black pillowcase... )this prevents the light from bouncing around.  Then place transparency on the screen and and a piece of glass ( I use glass from a picture frame)  on the transparency...this keep it good and flat.  Then I place a photo  halogen bulb (bought at the photo store) about 1 foot above the frame.  Turn on the bulb and let sit for about 10 mins.... Then take to the sink and rinse with room temperature water....it takes a minute but then it starts to wash away everything that was black on the transparency.... keep rinsing til your happy with it.    Let screen dry....I fan again...then it is ready to print.


Have fun printing Grin
« Last Edit: January 14, 2007 04:36:15 PM by petarver » THIS ROCKS   Logged
Shelichan
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« Reply #1 on: January 14, 2007 05:06:40 PM »

Oh nice! Ive always wanted to try real screen printing, and that makes it seem so simple!!! How much was the Potassium Dichromate? And also, sorry to ask a stupid question, but where can you get screens from?
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caradee
« Reply #2 on: January 14, 2007 06:33:13 PM »

What do you use to reclaim the screen?  Has this solution ever ruined one of your screens?  I have had that same recipe bookmarked for like 2 years but am afraid of trying it!
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petarver
« Reply #3 on: January 14, 2007 07:17:33 PM »

I bought my original screen from Michaels, in a speedball kit.  It wasn't long til I wanted to have several more.  I decided it was cheaper to make my own. So I got work and made my own frames and printing unit.   (actually my husband did most of it  Tongue) We made pretty basic frames that we trenched with a table saw and used that rubbery stuff (that you put new screens in sliding doors with) to press in the fabric. I bought some sheer material at the fabric store...and it works great.  Much cheaper way to start out....

I've never tried to reclaim a screen...I just simply replace the screen material. 

The Potassium Dichromate was pretty cheap...I can't quite remember.  I wana say that I paid between $10 -$15 for a pound.  Which will last forever.
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ingysoup
« Reply #4 on: January 14, 2007 08:33:05 PM »

Thanks very much for this semi-tut...and actually, the semi-tute make me think I CAN do it!  *Grumble* do I actually have to pay the water bill?  Why can't I play!!!  Dammnit all.
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caradee
« Reply #5 on: January 15, 2007 09:06:30 AM »

I see.
I have 5 screens, all are either aluminum or plastic frames, so I wouldn't be able to re-mesh myself.  I guess I'll stick with the store-bought stuff.
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Lizzybethdotnet
« Reply #6 on: January 15, 2007 05:30:04 PM »

You used water proof elmers glue with that, right?

I might try making my own emulsion...  I got a quart for free as a sample (amongst other goodies), but I seriously don't think I'll use it all up before it goes bad, even refrigerating it.
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petarver
« Reply #7 on: January 16, 2007 07:34:57 AM »

Nope...I use ordinary Elmers school glue. The same stuff I send my kids for school.   I never thought about water proof glue...  I don't know why it doesn't wash away...must be something about the combination.

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petarver
« Reply #8 on: January 21, 2007 10:40:03 PM »

Okay so tonight after I tried my first multi color shirt...and used 3 screens I tried washing the home made emulsion fluid out....and it came out no problem.  I used clorox clean up...the stuff in a spray bottle. Just an FYI... Grin happy printing
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StoryFromTheStars
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« Reply #9 on: February 10, 2007 02:15:13 PM »

This tutorial definitely makes me want to try printing!
It seems really easy!
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