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lol!
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Veg oil method works great....makes the black SUPER dark and the white very transparent. Wet 'em down on a piece of glass or sheet metal and paper towel them off a few times. Once you towel them they make no real mess at all, and the air bubbles are not an issue. I don't even mess with transparancies any more because they aren't as dark.
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Hi. New guy here...
I'm wondering the same thing about xeroxs on transparencies. Between Kinko's and an HP Laserjet, I couldn't seem to make the positive opaque enough to get a good exposure. The image is washing out, but not 100%, which leads me to believe that light is burning through the positive. I'd prefer to use transparencies or some kind of acetate above anything else. Any advice would be greatly appreciated. Also, for what it's worth, I'm using Diazo emulsion and burning screens with a 500 watt halogen work lamp (cage removed, of course). The exposure times have been between 7 and 11 minutes. |
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I've been using transparencies and cutting them together for large size ones (since my printer is only legal size) but I have a psoter to do and I was wondering about oiling some paper print outs (on the theory that they are easier to cut together)...how much do you guys think that would change the exposure time? I've been exposing screens on my UV light unit for 2 minutes with diazo emulsion. Would oiled paper double the time? I know I need to do a step test, but I have a little time crunch and a shortage of screens at the moment. :P
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