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Response to adding sodium sulfite to developer
from Fritz M. Brown (brownf@idhw.state.id.us)
Mea Culpa. I stated in my first post above that sulfite is a solvent
of metalic silver. Apparently I had my brain disconnected and fully
in neutral when I said that. Sodium sulfite is a solvent of
silver halides. It dissolves the undeveloped silver,
not the metalic silver. This solvent activity erodes the grain
structure of the film and softens the edges of the grain. The
disolved silver can also redeposit on the grains, again softening the
structure of the grain. Sorry for the confusion .
(posted 9025 days ago)
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