Donald Qualls
Subscriber
D-23 is possibly the simplest film developer in the entire library. Just metol, sodium sulfite, and water. The sulfite is doing triple duty here -- preservative, accelerator, and silver solvent.
But the replenisher for it is DK-25R -- which includes sodium metaborate in addition to metol and sulfite.
D-23 works fine at pH 8 of a sulfite solution -- is processing film adding enough acidity to require a significantly higher pH replenisher to offset?
But the replenisher for it is DK-25R -- which includes sodium metaborate in addition to metol and sulfite.
D-23 works fine at pH 8 of a sulfite solution -- is processing film adding enough acidity to require a significantly higher pH replenisher to offset?