[pure-silver] Re: FW: Re: Emulsion hardening for reversal processing of 35mm B&W film
- From: Nick Zentena <zentena@xxxxxxxxxxxx>
- To: pure-silver@xxxxxxxxxxxxx
- Date: Mon, 1 Nov 2004 08:54:58 -0400
On November 1, 2004 03:01 am, Richard Knoppow wrote:
> -----Original Message-----
> From: Nick Zentena <zentena@xxxxxxxxxxxx>
>
> There is a formula some place on the web that's basically D-76 with a
> few
> things added. I'll try and find it tomorrow.
>
> Nick
>
> That would be unusual. The problem with reversal first developers is
> that they must first of all develop to a much higher gamma than negative
> developers. They must have a small amout of halide solvent to avoid veiling
> of th highlights in the final, reversed, image. The halide solvent tends to
http://users.frii.com/jkbl/reversal/hd.html
The developer is D-76 with the addition of sodium carbonate, sodium
thiosulfate, and potassium bromide
The second page
http://users.frii.com/jkbl/reversal/pf.html
Claims that the formulas on the first page are the basis for PHOTOGRAPHER'S
FORMULARY.
Nick
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