Method of estimating the result of coloration and of reproducing a given color
US4635213A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 21, 1985 |
| Grant date | Jan 6, 1987 |
| Priority date | — |
| Expiry date | Feb 21, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J3/463
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
There are disclosed a color estimating method and a color reproducing method. Reference recipes of each colorant (i) having a know concentration C.sub.i are prepared and used to color a reference piece by each colorant recipe. Thereafter, the spectral reflectivity (R.sub.i ') of each colored reference piece is measured, and the non-boundary reflectivity (R.sub.i) is calculated from the measured spectral reflectivity (R.sub.i ') and the boundary reflectivity (Rg.sub.i) in the accordance with the following equation: EQU R.sub.i =R'.sub.i -Rg.sub.i Then, an optical density (.theta.oi) of the colored layer is derived from the non-boundary reflectivity (R.sub.i) and divided by the concentration (C.sub.i) to calculate an optical density (.alpha.oi) per unit colorant concentration, which is in turn multiplied by the concentration (M.sub.i) of each colorant (i) in the given colorant recipes to obtain the optical density (.theta.i) of each colorant (i) contained in the given colarant recipes. These optical densities (.theta.i) for i colorants are summed to obtain the total optical density .theta.mix. Thereafter, the spectral reflectivity (R') of the possible colored material is obtained fro…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.