Once the exposure is finished remove the acrylic and transparencies then go rinse your screen.
Uv light bulb screen printing burn.
Check to make sure the distance between the bulb and the screen is correct.
To expose a screen.
These videos cover most of the common issues with screen exposure.
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I use emulsion from anthem screen printing inkjet transparencies and a homemade exposure unit.
If you are having problems exposing your screen or with your image washing out we highly recommend watching these videos that help trouble shoot screen e.
This is how i burn my screen printing screens at home.
Turn on the light expose for the correct amount of time then turn off the light.
In a light safe environment center bulb directly above the middle of the screen at a height of 12 15 inches.
The higher your bulb is the longer your exposure time and the more coverage to the screen.