Dehalogenating Bleach

[Joe O'Brien]

Hello,

I just want to make sure I have the correct formula for bleach.

10g Potassium Ferricynide
10g Potassium Bromide
Water to 100ml

I'm looking to be able to redevelop my prints if I bleach to far, and the addition of KBr will enable that, correct?

 

[Athiril]

That's rehalogenating bleach, not dehalogenating.

 

[johnielvis]

you can also just bleach by putting in the ferri by itself...NO FIX....and...after you get judgement, you'll see how far to take it that way...if too far, you re-deveop...if oK...then put it in the fix and watch the bleach action begin...

 

[Rich Ullsmith]

Joe, I am going to assume you made a typo there. A 10g of Kbr + 10g K ferricyanide in 100ml of water is a stiff solution, maybe more suited to applying with a paint brush for precision.

The same chemistry with 1000ml of H20 is more suited to general bleaching and redeveloping.