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exposure time

Posted on Mon, 11 Jul 2005 at 19:43



Can anyone tell me how long to expose a 62 line photograph (image size is 7x10 inches) on 355 yellow mesh I'm using a 10,000 watt light. Any Help would be greatly appreciated.

dan

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Anonymous says: there is no correct answer until you test, because the time will depend on emulsion speed, coating pattern, and distance from the light source to the stencil surface. either get a calculator (Autotype ...

there is no correct answer until you test, because the time will depend on emulsion speed, coating pattern, and distance from the light source to the stencil surface.
either get a calculator (Autotype and a couple of others make them) or do a step wedge exposure, moving a black sheet or piece of ruby an inch every 10-20seconds - wash it out and figure what is the best time- you want to match your film to the stencil image, and the squeegee side of the screen should not be sticky. You have to test to get it right.
your lamp can be about 20" (for an 8x10 imageand will give you a good exposure. It will probably be pretty fast even with regular emulsion, that's a bright light!

posted on: Tue, 07/12/2005 - 4:22am

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