[pure-silver] Re: Red Filter

You can layer the rubylith if necessary and it will do for most papers (maybe 
not forte polywarmtone) but it depends on brightness.

I would add that these days LED safelights which have light output completely 
outside the range of B+W materials are the preferred choice and they can be 
bright enough to read by in the darkroom. They are also pretty cheap to make up 
yourself. Check the datasheets for your paper wavlength range and look out some 
LED's which output above that. Google is your friend.

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