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ABC pyro / Kodak D-1 question

rwboyer

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Oct 16, 2009
Messages
522
Location
MD USA
Format
Medium Format
I have read numerous sources that claim the recipe for solution A in ABC pyro should contain sodium metabisulphite vs sodium bisulphite or vice versa.

Does anyone know which one is "correct" or have both been used in the developer called ABC pyro/Kodak D-1?

RB
 
!!

Yikes! D-1, Are you trying to grow softballs??

a recipe
 
As The "film developers cookbook" States
A= Sodium bisulfite 9.8g
Pyrogallol 60 g
Potassium Bromide1.1g
Distilled water to make 1 litre

B= Sodium Sulfite Anhydrous 105g
distilled water to make 1 litre.

C= sodium carbonate mono 90
distilled water to make 1 litre

I honestly think is it easier to pick up the phone and order some from Bostich or the formualry.
Hope this helps though
Pat
 

As stated in the original question - I have seen documentation from multiple sources that lists one or the other. So thanks for confirming that there is a source that lists one or the other.

RB
 
The Sodium Bisulphite that is sold for photographic use is mainly Sodium Metabisulphite, pure Bisulphite is unstable and only available as a laboratory reagent, it's also expensive

Sodium Bisulphite:
Sodium Bisulphite . . . . . . 58 - 99%
Sodium Metabisulphite . . . 1 - 42%

Sodium Metabisulphite:
Sodium Metabisulphite . . . . . . 100%
Sodium Bisulphite . . . . . . . . . < 0.001%

In real terms they are interchangeable but for critical use then 97 parts Metabisulphite are equivalent to 100 commercial Bisulphite, the US manufacture Bisulphite while Europe tends to use Metabisulphite. Kodak Research wrote a paper on the interchangeability and while they aren't exactly the same said either could be used in most applications.

Ian
 
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Thanks - solved.

RB
 
Denis R said:
Yikes! D-1, Are you trying to grow softballs??

a recipe
Click to expand...

Actually ABC is not that "grainy" and....

Nothing I give a crap about with 8x10 - even in 35mm TX 400 in similarly formulated developers is not that "grainy" depending on lots and lots of factors - mostly tone distribution in the image from my perspective.

I find that although some images benefit from a really really smooth and the perception of infinite gradation - a lot of images that you may not like aesthetically because they are "grainy" you probably would not like if they weren't

RB

Ps. Here are two pyro developed (although Pyro-Metol developer but very similar to ABC in terms of grain) from 35mm TX and even TMZ at 3200 EI



 
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