B&w slide tried and true process

[Alessandro Serrao]

Kodak T-Max 100 (@100)

First development: Tetenal Eukobrom 1+5 (42ml) for 11 minutes at 20°C, add 125ml of a 2% di sodium hypo concentrate (equalling 2,5g of the same chemical specimen in 250ml), 1 inversion of 5 seconds every 15 seconds; diluition guideline: 125ml → 167ml → 250ml; start with 125ml of a 2% sodium hypo, then add 42 ml of developer (up to 167ml) then add water up to 250ml;

Washing: modified Ilford method 5/10/20/20 with tap water adding EDTA 2g/l;

Bleaching: 4g potassium permanganate in 1000ml of pure distilled water (stock solution A), 40g sodium bisulfate in 1000ml of pure distilled water (stock solution B); mix in a separate container 62ml from stock A and 125ml from stock B, then top it off to 250ml with pure distilled water; 5 minutes using constant agitation; it's paramount to prepare this solution just before use;

Washing: modified Ilford method 5/10/20/20 with tap water adding EDTA 2g/l;

Clearing: 25g sodium metabisulphite in 1000ml of pure distilled water, 2 minutes using 1 inversion of 5 seconds every 15 seconds;

Washing: modified Ilford method 5/10/20/20 with tap water adding EDTA 2g/l;

II° exposure: at the distance of 10 cm from a fluorescent bulb exposing for 1 minute each side of the spiral, mantaining it on the tank full of pure distilled water;

II° development: Tetenal Eukobrom 1+9 (25ml) for 6 minutes at 20°C (for other temperatures check the Ilford Conversion Table), 1 inversion of 5 seconds every 15 seconds;

Washing: modified Ilford method 5/10/20/20 with tap water adding EDTA 2g/l;

Fixing: add 5m of Tetenal Härter to 30ml of Agfa Agefix and then top it off to 250ml; treat for 5 minutes, 1 inversion of 5 seconds every 15 seconds;

Washing: modified Ilford method 5/10/20/20 with tap water adding EDTA 2g/l;

Washing: modified Ilford method 5/10/20/20 with tap water adding EDTA 2g/l;

Photo-flo: add 0,25ml of Agfa Agepon to 250ml of pure distilled water;

Hang to dry in a dust free environment (I use a home made film dryer using a Toyota air intake filter and a hair dryer under a big plastic bag)

[Alessandro Serrao]

The Permanganate should be acidified with Sulphuric acid.

Not necessarily.
Any strong acid would do.
Sulphuric is recommended only because it's readily available.

[Alessandro Serrao]

I'm in search of the chemicals for the above process but i want to make sure i'm getting the right SODIUM BISULFATE. Artcraft doesn't have it listed and i've only found it at two places that want about $40 per 125grams. Does this sound right? That seems pricey when i'd need 1/3 or that for a batch of bleach. Can someone post a link to a source? Is this something i can get at a pool supply store?
vinny

Soudium Bisulfate it's available as a Ph minus from any shop that sells pool chemicals.

[Ian Grant]

Not necessarily.
Any strong acid would do.
Sulphuric is recommended only because it's readily available.

Not at all true, if you use Hydrochloric Acid you will re-halogenate the silver developed in the first developer and then this will be exposed and developed again.

Ian

[Alessandro Serrao]

Not at all true, if you use Hydrochloric Acid you will re-halogenate the silver developed in the first developer and then this will be exposed and developed again.

Ian

Good to know.
I'm only developing by trial and error.

[Phillip P. Dimor]

Are there any convenient sources of sulfuric acid that are available possibly locally without having to source it through a chemical supply house?
Is muriatic acid a possible substitute?

[Phillip P. Dimor]

I should have RTFM, muriatic acid IS hydrochloric acid. Ooops.

[amuderick]

Sodium Bisulfate, when dissolved in water becomes a complex of sulfuric acid and sodium sulfate. I use it successfully in my bleach. I find it easier to handle, measure, clean up, etc.

You can find some at a pool supply store. It is sometimes sold as "pH down".

[Phillip P. Dimor]

Thanks for the heads up. Not that I have anything to hide from the DEA but I find that filling out that form and subjecting myself to their scrutiny would not be worth it in the least for 100ml of sulfuric acid.


Thanks again!

[amuderick]

You can buy sulfuric acid at an auto supply shop. They keep it behind the counter. It is used to top off lead-acid batteries. Just figure out the concentration and dilute down.

BTW, I wouldn't concern yourself with the DEA form. Do you know how many people fill those out every day? You are a grain of salt in the ocean.

[Alessandro Serrao]

You can buy sulfuric acid at an auto supply shop. They keep it behind the counter. It is used to top off lead-acid batteries. Just figure out the concentration and dilute down.

BTW, I wouldn't concern yourself with the DEA form. Do you know how many people fill those out every day? You are a grain of salt in the ocean.

I agree.