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Trying to get exposure time right

Posted on Mon, 5 Jul 2004 at 19:39

We are using a 500 watt halogen light, about 20 inches above. We are using Diazo emulsion on our screens. We are printing on velum using a canon i9100 inkjet printer.

We have tried 10 and 20 minute exposure times, and at 20 are still seeing some problems with the exposed emulsion washing out in some spots.

Is there any formula to this, or should we just continue the trial and error?

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