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chemical functions
dev. and fix. chemical functions
| Question | Answer |
|---|---|
| Phenidone | works quickly to produce white tones |
| Hydroquinone | works slowly producing black tones |
| Sodium carbonate | controls pH and swells the gelatin |
| Glutaraldehyde | controls emulsion swelling and enhances archival quality |
| Sodium sulfite | controls oxidation, maintains balance |
| Chelates | removes metallic impurities, stabilizes developing agent |
| potassium bromide | anti-fog agent, protects unexposed crystals |
| ammonium thiosulfate | removes undeveloped silver bromide from the emulsion |
| acetate | maintains proper pH |
| potassium alum | stiffens and shrinks the emulsion |
| sodium sulfite | maintains chemical balance |
| boric acids | removes aluminum ions |
| acetic acid | neutralizes and stops the developer |
| boric acids | remove aluminum ions |