Colour strength measurement and its use in production processes
US10031025B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 26, 2012 |
| Grant date | Jul 24, 2018 |
| Priority date | — |
| Expiry date | Apr 14, 2034 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01F2101/30
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method is provided for testing a diffusely reflective liquid for color strength, said liquid comprising particles in a carrier medium, e.g. white emulsion paint based on titanium dioxide. The method comprises measuring in situ a lightness parameter of the liquid, of the carrier medium and of the liquid diluted with amounts of carrier medium; and determining from said measurements a dilution parameter indicating the amount of carrier medium needed to produce a predetermined reduction in the lightness parameter of the liquid, said dilution parameter providing an indication of color strength. The lightness parameter may be L* in the CIE L*, a*, b* color space, and the test may be carried out using a diffuse reflection probe (10) configured to direct light from said probe (10) into the liquid and configured to collect a portion of the light from the probe (10) diffusely reflected by the paint for determining the lightness parameter. The results may be used for process control e.g. in emulsion paint manufacture.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.