Method of monitoring the preparation of a photographic emulsion by conductivity measurements
US5272027A · kind A · utility
18Cited by
11References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 11, 1992 |
| Grant date | Dec 21, 1993 |
| Priority date | — |
| Expiry date | Jun 11, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C1/015
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
While preparing a photographic emulsion a conductivity reading is continuously or periodically taken from the batch during creation. The conductivity of the batch is compared to a standard plot of conductivity versus time representing an ideal batch preparation process. When conductivity of the batch deviates from the standard plot by more than a pre-determined level, an operator can discard the batch, compensate for the deviations, identify the cause of the deviation for use in correcting existing processes and procedures or optimizing future procedures, or compensate for the deviations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.