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If you're not so great with mixing and applying liquid photo emulsion, photo emulsion sheets might be a quick and simple alternative. There is still a learning curve to using them as it's important to get the right amount of water on the sheet so that it's properly adhered to the screen and not so much that you have a pile of emulsion in one area. That being said it's much less a learning curve than getting that perfect layer of liquid emulsion down! Each sheet is 38 microns thick and exposure times will vary depending on your exposure unit. If you happen to have one of the, now retired, Yudu Machines the exposure time 'sweet spot' we found was about 14 minutes. Important notes: These sheets do have a shelf life: approximately 6 months when stored in cool DARK place. Photo Emulsion reacts with light! Keep away from light sources until ready to use! Directions for use: -Wet your screen evenly, squeegee off excess water (emulsion dissolves in water, so do not over-wet during screen prep) -Place dull side of emulsion sheet on the bottom of the screen (non-well side) -Pass squeegee over emulsion several times to adhere to screen -Check the back of emulsion sheet for dry spots and re-wet if necessary -Squeegee off any excess water -Allow screen + emulsion to dry completely in a dark place -When screen is dry, remove top plastic sheet from the emulsion -Burn your image (exposure times will vary depending on exposure units; if using a Yudu, burn for 14 min) -Gently wash out the burnt image immediately, it will have a very light green color (if all the emulsion washes off, it was not burned long enough; if the image is very hard to wash out, it was burned for too long) -Make sure all the light green emulsion is washed out and not blocking any holes in the screen -Let the screen dry completely before printing
