Recycling method for photographic processing waste liquid
US5573895A · kind A · utility
5Cited by
15References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 7, 1995 |
| Grant date | Nov 12, 1996 |
| Priority date | — |
| Expiry date | Jun 7, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S159/16
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A recycling method for photographic processing waste liquid is disclosed. The photographic processing waste liquid is subjected to evaporative concentration under a reduced pressure of not higher than 700 mmHg and at a temperature of not higher than 90.degree. C. The resulting distillate is used as a solvent for photographic processing agents or as an evaporation compensator for processing tanks of an automatic processing machine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.