> Regarding Howard's hybrid method of sensitizing, is he using just
> dichromate solution or dichromate solution plus some type of spirit|?
>
> Sandy
Typical ammonium dichromate concentrations are 1.5 - 2.5 g/mL in
50:50 v/v water/ i-propanol. Lower dichro more contrast to fit
negative dr.
Howard
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Received on Fri Dec 22 14:03:31 2006
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