Toning a bad developed fill

[narigas2006]

Hi All, I have a BW film (reversal) that I either overdid the 1st developer or screwed it during re-exposure. Anyway, I can see the image there but they are very faint. So I wonder if I could do some toning to darken the film. If so, would anyone have an idea how to do it? Many thanks!

 

[Ian Grant]

You can use Ilford IT-8 toner.

This uses a Dichromate bleach, same as ain ntensifier, then a Pyrocatchin staining developer so adds quite a lot of intensification.

Ian

 

[narigas2006]

Hi Ian,

the dichrom bleach is only the k dichromate alone right? no sulfuric acid like the reversal bleach. Also, does the pyrocatechin intensify the film more than selenium? many thanks!

 

[Ian Grant]

No the Dichromate bleach must contain Hydrochloric acid to re-halogenate the silver, I'd use the proportions for a strong Chromium Intensifier, this give very significant intensification. (You could still use Selenium as well)

Bleach
Ptassium Dichromate 10% solution - 100ml
Hydrochloric acid (conc) 2.4ml
Water to make 1 litre

The redevelop in

Re-developer from IT-8 Toner

Pyrocatechin 1.75g
Sodium Carbonate 15g
Water to 1 litre

Both solutions should be mixed just before use, particularly the re-developer which only keeps for a short time (15-20 mins). You get the intensification of the chromium intensifier plus the staining from the re-developer. The bleach bath is to completion, followed by a thorough wash which should be done in daylight (preferably) as this gives the re-exposure.

Re-development is to completion, about 3-4 minutes. I have used this combination to intensify negatives and it gives quite significant increase in density.

Ian