MOERSCH Tanol 500 ml = 2 x 250 ml concentrate

Staining negative developer for high resolution, maximum sharpness and relatively fine grain. Suitable for can and tray development. Rotation development is possible, but in direct comparison the sharpness performance is clearly lower. In contrast to the well-known stain developers based on pyrogallol, auto-oxidation starts much later. This is advantageous for N+ developments according to the zone system, a "collapse" of the developer during long development times is not to be feared. As with pyrogallol, a dye is formed proportional to the silver density. The "Tanol stain" is less noticeable to the eye than the "Pyro stain", but just as effective. The dye accumulates between the silver grains and reduces the impression of graininess that is almost inevitable with sharpness developers. When using fixed-gradation papers, the stain has no significant influence on the highlight contrast. With gradation change papers, the stain acts as an additional "soft" filter in the high densities. This developer is particularly interesting for large formats when negatives are to be usable for the conventional silver process and the "alternative processes" such as platinum printing, cyanotype, etc. The stain also has an effect on the contrast of the light. The contact processes from the early days of photography require high light densities with straight curves. The required contrast range is between 1.7 and 2.0 logD. Exposure is with daylight or with UV light sources. Because the stain blocks UV light, it can be printed directly from the original negative.

Shelf life of the concentrates: A 6 to 12 months, B unlimited
Packaging: 2x100ml makes 20 litres of working solution - capacity 40 films

2x250ml results in 25 litres working solution - capacity 100 films PE-bottle with dosing pipette
2x500ml results in 50 litres working solution - capacity 200 films PE-bottle with dosing pipette

When the dosing pipette is attached, the bottle is leak-proof, the use of a sealing cap is only necessary during transport.