DEVELOPER 106, equivalent to Edwal 106, is a glycin- hydroquinone based developer that produces brown tones. FORMULARY DEVELOPER 106 is a specialty, not a general purpose developer. A popular use for DEVELOPER 106 is the reproduction of an old photo. A negative of the old photo is made using modern materials then printed on Ektalure paper using DEVELOPER 106. Such a reproduction often has tones that match the original photo. The print results using DEVELOPER 106 depend both on the printing paper and the dilution used to make the working solution. Only slower chlorobromide papers, such as Opal or Ektalure are suitable. When a cold toned paper, such as Kodabromide, Ilforbrom, or Brovira, no warming of the print will be noticeable. When a chlorobromide paper is used, the print color will range from a warm black to an engraving brown depending upon the dilution of the stock solution. DEVELOPER 106 is similar to Carbone Sepia-Toned, Dassonville D-3 Autotoning, and GAF 115 Print Developers.
MIXING THE STOCK SOLUTION
You will need one 1 liter brown bottle for mixing and storing of the stock
solution.
STOCK SOLUTION
| Chemical | Amount | Units |
|---|---|---|
| Water (125°F/52°C) | 750 | ml |
| Sodium sulfite | 85 | g |
| Sodium carbonate (mono)* | 170 | g |
| Glycin | 28 | g |
| Hydroquinone | 9 | g |
| Potassium bromide | 4 | g |
| Water to make | 1000 | ml |
Place the warm water in the container and add the solid sodium sulfite in one portion. Stir (or cap and shake the container) until the sulfite has dissolved. Be sure all of the solid has gone into solution before proceeding. Add the sodium carbonate and again mix the solution to dissolve the solid. As before, be sure all of the solid has gone into solution before adding the next chemical. The glycin is added next. After the glycin has dissolved, then add the hydroquinone. Hydroquinone often dissolves slowly so be sure all of it is in solution before adding the potassium bromide. The speed at which potassium bromide dissolves depends its crystal size, the large crystals dissolve slower. If you wish, the solution can stand at this point until the potassium bromide dissolves. Finally add water to make 1 liter. The temperature of this final portion of water is not important but be sure to shake (or stir) the mixture to obtain a homogenous stock solution.
SHELF LIFE
In a closed bottle, DEVELOPER 106 should last more than six weeks. Unlike
other developers, the color of solution cannot be used to determine its
activity. The development of a test strip is required to determine if the
solution is still active.
USAGE
FORMULARY DEVELOPER 106 is usually diluted 1:7 with
water to make the working solution
(125 ml of stock solution, 875 ml of water
to make the working solution). Development times are 2-3 minutes at 68°F/20°C.
Greater dilution produces warmer tones. DEVELOPER 106 can be diluted 1:15
(60 ml of stock solution, 900 ml of water to
make 960 ml of working solution). With higher dilution, print exposure will
have to be increased and longer development times (5-8 minutes) will be
required at 68°F/20°C.
NOTES
With this developer it is possible to produce prints in greens, reds,
browns, and blacks, of various shades. The color produced depends on the
following factors:
With slow contact papers (chloride) the colors can vary between green, red, brown and sepia. For chloride and chlorobromide papers dilute developer with 7 parts water. Develop 4 to 6 minutes for brown-blacks. For bromide papers dilute developer with 3 parts water. Exposure should be 3 times normal and developed 60 to 90 seconds. At 8 times normal exposure, tones are brighter and tend toward brick red. With Opal paper, dilute one part developer with 15 parts water to produce green tones. At this dilution, enlarging papers produce gravure-brown. Enlarging papers should not be given more than 1 to 1½ times normal exposure.
REFERENCE
106 Paper Developer, Kit No. 02-0050,
Photographers' Formulary (800-922-5255).
Dassonville D-3 Autotoning Print Developer, Photo-Lab-Index, Section 15, Supplement 172, p. 42