Method for calculating dye formulations of pigmented effect dyeing tones

US6064487A · kind A · utility

Assignee

• Herberts Gesellschaft mit beschrankter Haftung · DE

Inventors

• Wilhelm Kettler · Wuppertal, DE
• Matthias Kolb · Wuppertal, DE
• Hartmut Krause · Erlangen, DE

Key dates

• Filing date: Jan 11, 1999
• Grant date: May 16, 2000
• Expiry date: Jan 11, 2019

Classification

• Technology area (CPC G): Physics
• CPC primary: G01J2003/2866
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

Process for calculating colour formulations of pigmented special-effect shades wherein i) for each pigment on which a colorant system is based a set of calibration panels is created, and the associated reflection factors are determined experimentally, ii) from the measured reflection factors for each pigment on which the colorant system is based, the optical material parameters are determined using a radiation transport model to describe the diffusion of light in particulate media, iii) from all the platelet-like special-effect pigments on which the colorant system is based and in each case a fixed quantity of one or more colouristically inert topology-influencing fillers, so-called pseudopigments are formed whose optical material parameters are likewise determined by way of a calibration scale, iv) and, the formulation components and pigments and/or associated pseudopigments from a colorant system being specified, the reflection spectra of a special-effect shade which is to be rematched are simulated mathematically by reference to the optical material parameters, using a suitable radiation transport model to describe the diffusion of light in particulate media, with the associated…