Formulary's 106 Warm Tone Paper Developer is equivalent to Edwal 106 and Ansco 115. It is a glycin and hydroquinone-based developer. Developer 106 is a specialty developer and is popular for the reproduction of old photos. Formulary developer 106 produces 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 3 to 4 months.
Posted by Eric Searing on 30th Sep 2017
The tech info for this developer needs to be updated since it references papers that have not been made in more than 15 years. This formula does not produce brown tones on modern silver based enlarging papers. It does have one feature when used with current warm tone papers; The paper must be exposed longer than a standard developer to achieve max black in development. This comes in handy with thin negatives or dark scenes. The extra time allows for more manipulation. It does produce a slightly warmer tone on the Bergger CB variable Contrast Warm Tone paper than others I have tested. The original Ansco formula I found for brown tone developer did not contain glycin, but contained more Hydroquinone. Not sure it would make a difference.