Category Archive: Exhaustion & Disposal

Q: How do I know when my Sprint™ working solutions are exhausted?

Sprint™ BLOCK Stop Bath working solution will change from yellow to lavender when exhausted. When using BLOCK, QUICKSILVER Print Developer, and RECORD Speed Fixer simultaneously, the lavender color of Block will signal exhaustion of all three solutions. For shelf life more »

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Q: How do I dispose of used darkroom chemicals?

In general, used darkroom chemicals, except fixer, may be disposed of in a municipal sewer system if one has a home-based darkroom. Used solutions should never be disposed of in a septic system. Septic systems are designed for biological treatment more »

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