buffered stop bath (replenishable)

[Ryuji]

Ryuji submitted a new resource:

(there was a url link here which no longer exists) - buffered stop bath (replenishable)

acetic acid, 90% 20ml
sodium acetate 80g
water to make 1.0 liter
target pH 5.0 plus/minus 0.5

same thing can be made this way:
acetic acid, 90% 60ml
sodium hydroxide 25g
water to make 1.0 liter
target pH 5.0 p/m 0.5

Either bath can be replenished at the rate of 30 ml glacial acetic acid per each 30 of 80 sqi processed. Buffered stop bath may appear more expensive but lasts MUCH longer than 1.7% acetic acid bath. The replenishing capability is very useful for Nova slot processor...

(there was a url link here which no longer exists)