exposure formula?

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exposure formula?

Discuss the various aspects of screen printing. Inks, speciality printing, print locations, durability, etc.

May 29th, 2007	May 29, 2007 7:23:03 AM - #1 (permalink)
eatpaste Forum Member T-Shirt Apprentice Member Since: Feb 2007 Posts: 4 Thanks: 0 Thanked 0 Times in 0 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	exposure formula? Hi, I'm using a 1000w metal halide, 21 inches under 1/4" glass, with an image on a transparency, on a 12 x 16, 12xx screen with speedball emulsion. Is there a formula I can use to figure the exposure time? I tried once using the FAQ on the speedball website which said 1000w at 40" at 140 seconds. Umm, I think the screen was underexposed because as I started washing it out, I could see the image, but then emulsion around the image started washing out. Any advice?
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