RS DS-10

Type de produit

Film Developer

Caractéristiques

Very good general-purpose developer similar to Xtol.
Full emulsion speed, normal contrast, maximum shadow detail and excellent grain characteristics.

Commentaires sur la formule

This is a very fine grain developer with no loss of speed or shadow details. This developer is intended to meet the image quality of Kodak XTOL developer, but with more robustness against trace impurities, which may have caused unpredictable failures with XTOL. DS-10 is also fine-tuned to medium speed and fast films; DS-10 does not work well with some slow films.
One way to make DS-10 work "better" with slow film is to dilute 1+2 and use at 25C or higher temperature. But I generally find slow films to work better with developers of DS-12 type, and that's why I recommend two developers for different kinds of films.
Phenidone may be substituted for Dimezone S, but the fog level may be slightly higher, and the solution may not keep long.
The target pH is set 8.00 instead of XTOL's 8.20 to obtain slightly finer grain, though at about 20% increase of development time. If pH of 8.20 is targeted, the development time is nearly identical to XTOL time. This can be achieved by cutting down the boric acid to 2.0g, and this variation is called DS-10X.
This developer may be diluted 1+1 by combining one part DS-10 and one part water.
DO NOT USE DS-10 with:
* APX25, APX100
* Pan F Plus
* Lucky 100 speed
The problem with DS-10 and many films of box speed 100 or slower is very distorted sensitometric curves, loss of speed, and often with low density. The developer is adjusted to develop slowly, with suitably adjusted level of solvency, so that the developed silver grains consist of compact filaments rather than widely spanning filaments typical of coarse grain developers. However, this strategy doesn't work well with the way slower emulsions are made.
DS-10 development time can be estimated by finding suggested XTOL development time for small tanks and multiplying it by 1.2.

Formule chimique