Intro: Basic DIY Woodglue Photoemulsion
These Instructions will lay bare the simplicity and flexibility of making photoemulsion for screenprinting. I feel that the Photoreactivity of emulsion spooks some beginners, who think something like a dark room is needed. Watch as i burn a screen with no regard for ambient lighting and the most minimal of materials.
Woodglue - I had the tail end of a bottle , like 1/4 cup or so
Potassium DiChromate - bought some about a year ago and haven't even used half. I dumped out what looked like about 1/4 gram ish.
water from the tap
random clear sticker with a muppet drawn on in sharpie
Step 1: Mix Dichromate and Tapwater in a Little Vial
Added a few ml of water and shook until mostly dissolved.
Step 2: Dump and Shake
dump the vial of now orange water into the glue bottle. wear gloves and shake it well. at this point it becomes photosensitive so i moved to the dimly lit bathroom
Step 3: Coat the Screen
I just squirt it on and smooth both sided again and again. whatever scrapes off onto the squeegee is discarded until theres no holes or unevenness. Immediately i dried it with the hairdryer on cool for about five minutes. Keep it dim, once dry the emulsions sensitivity is at max.
Step 4: Make a Master
this one some dude drew and left at my house. Its just sharpie on clear vinyl
Step 5: Burn (exposure)
Stuck the sticker on, put a black board under and set it in the partial sun for 30-60 seconds. check after thirty you should see a marked color change. if not, give it more sun
Step 6: Washout
peel off the master and wet the screen. let it sit a couple minutes then rub it gently with fingertips under cold water . once the emulsion is washing out a short burst from the spray nozzle will clear it out. Be careful. after its clear let it cook in the sun to dry
Step 7: Print!
Thats it , It works!