Method for the production of a digital colour catalogue

• US 20060190121A1
• Filed: 11/06/2003
• Published: 08/24/2006
• Est. Priority Date: 11/15/2002
• Status: Abandoned Application

• Current Assignee: CIBA Specialty Chemicals
• Original Assignee: CIBA Specialty Chemicals
• Inventors: Klumb, Harald, Magli-Schmitz, Ingrid
• Application Number:
  US10/534,515
• Publication Number:
  US 20060190121A1
• Time in Patent Office: Days
• US Class Current: 700/130
• CPC Class Codes: G01J 3/46 Measurement of colour; Colour measuring devices, e.g. colorimeters measuring colour temperature G01J5/60
• CPC Class Codes: G01J 3/462 Computing operations in or between colour spaces; Colour management systems
• CPC Class Codes: G01J 3/52 using colour charts

Abstract

A method for the production of a digital colour catalogue, which comprises a) drawing up a requirement profile for the desired dyeing, b) selecting a group of dyes that meet the requirement profile that has been drawn up, c) determining within the colour space the colour position of the said dyes for the desired dyeing, d) segmenting the colour space of the dyes within a depth of shade plane into triangular areas according to shade, wherein the corner points of the triangular areas correspond to the colour position of the dyes in question, and the said dyes define a range of shades delimited by the triangular areas, e) dividing the triangular arcas within a depth of shade plane arithmetically into a grid in such a manner that the points of intersection of the grid are distributed evenly over the triangular areas, where the points of intersection of the grid correspond to a colour position and a reflectance curve calculated on the basis of a dye recipe is associated with each of those colour positions, and f) if desired visualising the reflectance curves associated with the colour positions by means of a suitable medium, is suitable for providing a comprehensive catalogue of different shades together with the associated dye recipes.

Claims

1. A method for the production of a digital colour catalogue, which comprises:

a) drawing up a requirement profile for the desired dyeing,

b) selecting a group of dyes that meet the requirement profile that has been drawn up,

c) determining within a colour space the colour position of dyes for the desired dyeing,

d) segmenting the colour space of the dyes within a depth of shade plane into triangular areas according to shade, wherein the corner points of the triangular areas correspond to the colour position of the dyes in question, and the said dyes define a range of shades delimited by the triangular areas,

e) dividing the triangular areas within a depth of shade plane arithmetically into a grid in such a manner that the points of intersection of the grid are distributed evenly over the triangular areas, where the points of intersection of the grid correspond to a colour position and a reflectance curve calculated on the basis of a dye recipe is associated with each of those colour positions, and

f) optionally visualising the reflectance curves associated with the colour positions by means of a suitable medium.

2. A method according to claim 1, wherein a computer is used to implement Steps c), d), e) and f).

3. A method according to claim 1, wherein a computer is used to store and manage the data obtained.

4. A method according to claim 1, wherein the FTa*b*. colour space is used as colour space.

5. A method according to claim 1, wherein the desired dyeing is a dyeing on leather or on a textile fibre material.

6. A method according to claim 1, wherein the dyes are disperse dyes, acid dyes, metal complex dyes, reactive dyes, vat dyes, sulfur dyes, direct dyes or pigments, or cationic dyes, natural dyes, developing dyes or food dyes.

7. A digital colour catalogue obtained according to the method of claim 1.

8. A method for the production of a dyeing on leather or on a textile fibre material, which comprises determining the amounts of dyes to employ from a digital colour catalogue according to claim 7.

9. A method according to claim 1, wherein the desired dyeing is a dyeing on a textile fibre material.