PBQ #3
30 g Potassium Iodide
15 g Borax
2 g Potassium Dichromate
2 g p-Benzoquinone added just before use.
One litre water
Bleaching time: One and a half times the time it takes to clear.
Temperature: 20C Agitation: Intermittent
Shelf life: Probably not too long after the PBQ is added.