[pure-silver] Re: Pyro Stain

>
>> UV cut-off of the filmbase is in the region of 325 - 320 nm.
>
>Are you talking about the density of the poly(ethylene telephthalate)
>film base itself? 

Processed film - guts, feathers, and all.  The major absorber is probably
the PET film base since I have not observed any significant differences
between HP-5, Tri-X or BPF-200.

Happy New Year to all.




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