Concentrate and Working Solution for E-6 Reexposure Bath Based on Kodak's US5948604A

[Rudeofus]

Rudeofus submitted a new resource:

Concentrate and Working Solution for E-6 Reexposure Bath Based on Kodak's US5948604A - E-6 reexposure bath formula derived from patent US5948604A

Kodak provided a "teaching patent", i.e. a publication for preservation of knowledge, for their 5 liter E-6 home processing kit. The original patent text can be seen here. While anyone with access to these formulas and ingredients could start mixing and using, this article tries to make these formulas more accessible to amateurs. Please note, that all liquid ingredients except for dilute aqueous solutions and water are given in...

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[Michael Howard]

This is very interesting, spells it all out with dilutions, etc. I haven't tried yet, but I suspect most amateurs will have no hope of getting many of the chemicals needed. Thanks for posting this!

 

[Rudeofus]

If you need a reexposure bath mixed from "amateur ingredients", then here is what I would use:

Ingredient/Target	250ml	500ml	750ml	1000ml
Water	200ml	400ml	600ml	800ml
EDTA free acid	0.75g	1.50g	2.25g	3.00g
NaOH 25% w/w solution	8ml	16ml	24ml	32ml
Acetic Acid 10% w/w solution	38ml	75ml	113ml	150ml
SnCl2* 2 H2O	0.25g	0.50g	0.75g	1.00g

I would mix this bath fresh, beware of sudden death!

If you want to mix the long lasting concentrate, then you may be able to pester Suvatlar or Formulary into supplying you with Dequest 2000 or Dequest 2006. The other ingredients should also be available from at least these two.