View source for Silver Halide Sensitized Gelatin

=SHSG for PFG-03C and PFG-03M=

from: 
*'''Transmission and Reflection SHSG Holograms''' - Kim, Choi, Choi, Kim, Kim, Bjelkhagen, Phillips - SPIE
*'''SHSG processing for three-wavelength HOEs recording in Silver Halide Materials''' - Kim, Choi, Bjelkhagen, Philips - SPIE

I have made some assumptions about their process. Please read the source if you are serious about this process. 

==Hardening bath==
*Formaldehyde (37%) 10ml
*Potassium Bromide 2g
*Sodium Carbonate (anhydrous) 5g
*Deionized Water 1L

==Stop Bath==
*2% Acetic Acid Bath

==Bleach== (pH 5)
*Cupric Bromide 1g
*Potassium Persulfate 10g
*Citric Acid 50g
*Potassium Bromide 20g
*Borax 30g
*Chromium (III) Potassium Sulfate 20g
*Deionized Water 1L

Add 1g Metol after everything is mixed

==Fix Bath==
*Ammonium Thiosulfate (anhydrous) 10g
*Sodium Sulfate (anhydrous) 20g
*Deionized water 1L

==Process==
*Prehardening 6 min
*Develop G282C Diluted 1 to 3 to 1 to 5 3 min
*Rinse Running Deionized Water at least 3 Min
*Stop
*Wash?
*Bleach (diluted 1:3) 15 min
*Warm water bath (60C) 10 min
*Wash?
*Dehydrate 50% IMS 3 min
*100% IMS 3 min
*Dry in 45C oven 5 min
*Vapor harden with Formaldehyde 25 min or 50% glutaraldehyde vapor *25min
*Fix 2 Min
*Wash
*Dehydrate 50% Isopropyl 10 min
*100% 10 min
*100% 70C 2min
*Dry in 45C oven.

Seal with Pascofix

==Notes==  
From Martin:

The two developers mentioned in US 4108661 might be candidates for developers a la G284c:

I 
*hydroquinone: 16.5 g 
*potassium bromide: 1.7 g 
*sodium salt of EDTA: 1.7 g 
*potassium metabisulphite: 40 g 
*1-phenyl-5-mercaptotetrazole: 35 g 
*sodium hydroxide and water to make: 1 liter at pH 11.8.

II
*hydroquinone: 25 g 
*potassium bromide: 2.5 g 
*sodium salt of EDTA: 2.5 g 
*potassium metabisulphite: 62.5 g 
*1-phenyl-5-mercaptotetrazole: 50 mg 
*potassium thiocyanate: 0.5 g 
*sodium hydroxide and water to make: 1 liter at pH 11.8 

(Colin's Note: These developers have some of the features but the MSDS includes Potassium Sulphite and Hydroquinone as the only listable toxins. Info from Kim et. al. G282C is the high speed reversal prosess for AGFA Millimask Plates. "Such non-tanning developers usually contain halide solvents and encourage sharp developed edges." 



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by Martin 

Maybe I should have pointed to another paper (also in SPIE 4659) by a Russian group (Evstigneeva, Drozdova, Mikhailov) dealing with SHSG.
The authors recorded pulsed holograms on VRP plates (which incidentally are said to come close to PFG-01). (Colin's Note: VRP is green sensitive and PFG-01 is Red Sensitive. For more details see www.slavich.com)

They describe the following processing steps:
#Development in a non-tanning developer (SM-6);
#rehalogenating bleach (permanganate);
#intermediate alcohol (ethanol) drying;
#uniform second exposure;
#second development in diluted developer;
#reversal bleaching (dichromate);
#fixing;
#dehydration in isopropanol.


The potassium permanganate bleach is formed by:
*Pot. permanganate ................0,4g
*Sulfuric acid ...................0,4ml
*Sodium chloride....................10g
*Water...............................1L


The second developer:

*Sodium sulfite ......................5g
*Metol................................5g
*Hydroquinone........................10g
*Ascoribic acid......................10g
*Phenidon.............................1g
*Sodium hydroxide....................10g
*Water................................1L