Glycin and tri-sodium phosphate developer for films and papers.
|Mix chemicals in order.|
|Sodium sulphite anhydrous||80||grams|
|Tri-sodium phosphate monohydrate||120||grams|
|Water to make||1||liter|
For tray dilute 1:4 and develop for 5–7 minutes. For tank use dilute 1:9 and develop for 7–11 minutes or dilute 1:14 and develop for 10–14 minutes or dilute 1:24 and develop for 15–19 minutes. Temperature is 18.5°C.
Glycin-TSP is an excellent developer for papers too where very delicate gradations must he shown, such as in women’s and children’s portraiture and high-key work. If diluted with less than the specified amount of water, so as to produce stronger contrast, it is also excellent for subjects where surface texture must he shown, such as men’s portraits, pictures of sand, snow, insects, flowers, etc. Since the solution contains trisodium phosphate, a citric acid stop hath and a citric acid fixer should be used.
The developer works 18.5—21°C but can he used successfully up to 32°C on bromide papers, and hence is a good summer-time developer.
When very hard water is used in making up the stock solution or if it is kept in a cold place, partial crystallization sometimes occurs in the stock bottle. If this happens, warm the solution till the crystals dissolve and dilute with an equal volume of water to make a more dilute stock. Then use only half as much water when diluting for use. The use of the regular concentrated stock solution is to be preferred if possible, because it keeps very well even in partly filled bottles.