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exposer time per watts //

Posted: Thu Dec 22, 2016 1:50 pm
by JPT
In the Speedball manuel they list expose time for a 115 watt bulb, 12" up at a 10x14" screen as 45min
with a 250watt BBA bulb at 10 min. Now I have a 200 watt std ---is there a chart some where to
calc. the time for bulbs between 150 and 250 watts ??
Note: I ran a screen with the 200 watt for 17 min (a wild guess) it washed out well and so far looks very good
Maybe all this timing is BS// JPT

Re: exposer time per watts //

Posted: Thu Feb 16, 2017 11:34 am
by d fleming
Try googling step wedge test. Or do a site search for it.