Alternative for pyrogallol
On: Fri, Dec 21, 01 04:42:30 PM
Jean Dufrasne wrote:
Hello everybody,
I'm looking for an alternative for pyrogallol,
I'll use Red Star emulsion to make reflexion holograms.
Lot of documentation present formula with pyrogallol.
My question is : Is there an alternative for pyrogallol ?
Can I use classical developer product (for BW film) ? If
yes, which one ?
Thanks in advance. |
RESPONSES
Colin Kaminski - Sun, Dec 23, 01 05:01:29 PM
I don't use Red Star but here are some ideas:
GP-9
Phenidone .026 g
Hydroquinone .665 g
Anhydrous Sodium Sulfite 13 g
Potassium Hydroxide 1.38 g
Ammonium Thiocyanate 3.12g
Distilled Water 1 L
GP-61 - transmission
Distilled Water 700cc
Metol 6 g
Hydroquinone 7 g
Phenidone .8g
anhydrous sodium Sulfite 30g
Anhydrous Sodium Carbonate 60 g
Potassium Bromide 2 g
Sequesterine Agent 1 g
Water to make 1 L
GP-62 - reflection (use Bleach)
Part A
Distilled Water 700 cc
Metol 15 g
Pyrogallol 7 g
Anhydrous Sodium Sulfite 20 g
Potassium Bromide 4 g
Sequestrene Agent 2 g
Water to make 1 L
Part B
Distilled Water 700 cc
Anhydrous Carbonate 60 g
Water to make 1 L
Kodak D-8
Ascorbic Acid 18g
Sodium Hydroxide 12 g
Sodium Phosphate Dibasic 28.4 g
Distilled water 1 L
Just before use add Phenidone .5 g
Bleaches
Transmission bleach
Water 1 L
Potassium Ferocyanide 1 tablespoon
Potassium Bromide 1 tablespoon or
Cupric Bromide 1 tablespoon (not both!)
Reflection bleach
water 1 L
potassium Bromide 30 g
Borax 15 g
Potassium dichromate 2 g
Just before use add PBQ (p-benzoquinone) 2 g (good for 15
minutes)
PBQ
Water 1 L
Mercuric Chloride 1 tablespoon
Potassium Bromide 1 tablespoon
or
Water 1 L
Potassium Bromide 30 g
Boric Acid 1.5 g
PBQ 2 g
Good for only 15 minutes!
or
Sulphric acid 1 g
potassium Bromide 5g
Methyl Paraben 2g
Hydrogen Peroxide 4 g (you have to figure the weight of
the Hydrogen peroxide in you solution!)
Potassium Alum 5g (hardener)
PBQ 1 g
Phenosafranine 1g (desensitizer)
GP-431 Bleach
Water 600 cc
Ferric Nitrate 8-hydrate 150 g
Potassium Bromide 30 g
Dissolve .3 g of Phenosafranine in 250 cc of methanol and
then add.
Water to make 1 L
Dilute 4 parts water to 1 part gp-431 before use.
64.170.192.223
Jean Dufrasne - Mon, Dec 24, 01 01:27:45 AM
Colin,
Thank you so much for the formulas.
Now, I have a lot of them to test the best one.
Seems that you have one of the more prolific writer on this
forum (even on yahoo :-) )
Have you a web site to show your realisations or your lab ?
If not, I can help you if you want. Just send me your
email and I'll contact you if you are interesting. I'm a
web programmer and I can design you web site (static or
dynamic) if you want.
Best regards.
Jean
j_dufrasne@hotmail.com
216.138.209.204
Colin - Mon, Dec 24, 01 06:51:46 AM
Thank you Jean. Since I don't have a digital camera I have
very little content for a web site. Perhaps in 2002. 64.170.192.223
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