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Edwal TST Developer is one of the most versatile black and white paper developers available. By using this developer, you can achieve a wide range of tones ranging from cold to warm black. The recommended working temperature of this developer is 55-90°F.
1 gallon of TST produces 12 gals. for heavy-duty applications,or 16 gals. for a commercial strength developer. And 20 gals. for portrait strength developer, which can develop over 4,000 - 8 x 10 prints.