Moersch Tanol B&W Staining Film Developer ~ 2x 100ml or 2x 250ml

Moersch Tanol B&W Staining Film Developer, in contrast to the well-known “Pyro” staining developer, begins the oxidation process much later in the development process creating an advantage for N+ developing in the Zone System which means much greater stability during longer processing times.

A coloured stain builds up in proportion to the silver content of the film, the Tanol-based stain being more subtle than the Pyro-based stain, but has just as strong an effect.

The colouring agent builds up between the silver grains, and therefor minimizes the graininess that is otherwise almost unavoidable with a sharpness-enhancing developer.

When used to print on a fixed-grade paper, the stain has virtually no effect on the contrast. However, with variable-contrast paper the denser areas of stain will act like a soft-contrast filter.

This developer is particularly interesting for large format film, more if the negatives are to be used for tradition silver, Platinum, Cyanotype printing, or other alternative processes.

(Rotation development is possible, but in direct comparison with tank or tray development the sharpness will be reduced.)

Makers’ Safety Data Sheet HERE

Development Times HERE and HERE