Re: developer for big grain

Sil Horwitz (silh@iag.net)
Mon, 28 Oct 1996 17:40:39 -0500

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At 04:14 AM 961029 +1100, David Kennedy wrote:

>Rodinal uses potassium silfite not sodium sulifte and is almost black at the
>end of developement really more purple black. Anyway the potassium sulfite
>does not seem to eat away the grain as does sodium sulfite.

Potassium sulfite is more soluble than sodium sulfite, which is the reason
it's used in concentrated solutions. But it does have the same effect in
reducing grain edges.

Sil Horwitz, FPSA
Technical Editor, PSA Journal
silh@iag.net

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