Check out our screen printing tutorial (you can skip to Step 3, approx 4min 53 secs) for the section showing how to prepare the emulsion and coat the screen.
When used with exposure units/Light sources other than our 1000watt halogen light, exposure times will vary:
Pre-Sensitized – up to 12 months
Sensitized – 4-8 weeks
Emulsion is best stored in a cool dark environment where adverse weather conditions do not occur. If the storage temperature is warm or hot, or below freezing, emulsion has a tendency to react and will pass its expiry date. The most obvious way of telling whether the emulsion has expired is upon ‘clearing the image’ with water, the sensitizer will not have reacted to the light source and the emulsion will simply wash out completely.