Photographers' Formulary 106 Warm Tone Paper Developer (4L)

This is a glycin- and hydroquinone-based developer equivalent to Edwal 106 and Ansco 115. It is a specialty developer and is popular for the reproduction of old photographs, producing warm blacks to engraving brown on chlorobromide papers. The final color of the print depends upon the dilution of the stock solution. The prints have normal tonal separation and normal to low contrast.

The chemicals in Formulary 106 are used to make a stock solution which is diluted 1:7 or up to 1:15, depending on the warmth of the tone desired. The stock solution is stable for three to four months.