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Hazardous wastes in the printing industry

◆ photographic material wastes

1. Waste developer (fixer), film and waste image paper produced by using developer for film development, fixer for film fixation, and potassium ferricyanide and thiosulfate for image thinning (bleaching). (the hazardous characteristic is toxicity)

2. Waste developer (fixing) solution, film and waste image paper produced by using developer for printing development, anti-corrosion graphic development and relief printing. (the hazard characteristic is toxicity)

◆ chromium containing waste

3. Waste residue and waste water treatment sludge generated from swirling flow anti-corrosion coating (anti-corrosion and photosensitive anti-corrosion layer, etc.) using colloidal organic solvent and adhesive containing dichromate. (the hazard characteristic is toxicity)

4. Waste residue and waste water treatment sludge produced by chemical hardening of the anti-corrosion layer with chromium compound. (the hazard characteristic is toxicity)

5. Use the tank slag, tank liquid and wastewater treatment sludge generated by chromic acid chromium plating. (the hazard characteristic is toxicity)

◆ copper containing waste

6, waste etching solution and waste water treatment sludge produced by copper plate etching with acid or ferric chloride. (the hazard characteristic is toxicity)

◆ waste liquid and residue produced by mercury containing waste

7, image thickening (physical precipitation) using developer and mercury compound, and image thickening (oxidation) using developer and mercuric chloride. (the hazardous characteristic is toxicity)

◆ lead containing waste

8. Waste liquid produced by lead tin alloy plating during the manufacturing of printed circuit boards. (the hazard characteristics are such key parameters as toxic active calculation maximum force, tensile strength, compressive strength, yield point, etc.)

◆ waste halogenated organic solvents

9. Use organic solvents for rubber plate printing, and clean the waste halogenated organic solvents produced by printing tools. (the hazardous characteristics are flammability and toxicity)

◆ waste organic solvent

10. The waste produced by using organic solvent for rubber printing and cleaning printing tools is the solvent of closed oil return valve machine. (the dangerous characteristics are flammability and toxicity)

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