Book publication
February 2023
Kit for two bath development with ?

Dilution of the lith developer A+B+water: 1+1+10 to 1+1+30
Dilution of the oxidisation bath ? with water: 1+100 to 1+500
Dilute Lith D 1+4 with water and optionally add small amounts to the Lith bath. This will slow down the lith reaction if you are using a lot of exposure to get intensive colours. Avoid development times of less than 90 seconds to ensure reproducibility of your results. Dosage: 10-80% of the amount of Lith A you used.

Fine tuning

The time of development should be between 90 seconds and 4 minutes. If maximum black is reached only later than that, you should either extend exposure or use a stronger developer working solution.
While in the second bath, if the densities increase more than you want already after less than one minute, you have to dilute the intensifying bath more.
If it turns too colourful already after intensifying for less than one minute, you can either add some drops of Lith D (diluted 1+4!) or replace parts of Lith ? with Lith B.

The intensity of the colours is determined by the treatment time in the intensifying bath and by the amount of developer substance carried from the developing bath to the second bath. By nature, with fibre base paper there is more developing substance available for the oxidisation bath than with RC paper. A surplus of Lith A in the lith developer working solution will result in an increase in colourfulness and densities while in the second bath.

Lith Ω contains ammonium carbonate. To avoid unpleasant odour of the stock solution, the bottle comes with a graduated pipette. The pipette-fitting in the bottle closes the bottleneck completely. This allows you to extract required amounts without having to open the bottle.


Your basket is empty.
Wolfgang Moersch Photochemie
Am Heideberg 48
50354 Hürth

Tel.: +49-2233-943137
Fax.: +49-2233-943138


Data protection