GP 62
PART A
15 g Metol
7 g Pyrogallol
20 g Sodium Sulfite
4 g Potassium Bromide
2 g Na4 EDTA
One litre of water
PART B
60 g Sodium Carbonate
One litre water
Mix one part of Part A with 2 parts water and one of Part B.
Development time:
Reflection holograms: Two minutes
Temperature: 20C Agitation: Constant
Shelf life: Part A might not last too long, but Part B will last indefinitely.
Primary recommendation by Agfa for reflection holograms when the HD series of Holotest emulsions came out, but I never got good holograms with this formula on their 8E75HD stock, but this stuff rocks on 8E56HD!
Source: Agfa Gevaert Technical Information Bulletin 21.7271(480)