Process for computing dyeing and printing recipes in accordance with a given shade

A process for computing a dyeing or printing recipe corresponding to a given shade, wherein a) a given shade in a FTa*b* colour space is defined, where FT is a depth of shade value which, irrespective of hue, defines points of equal colour strength which by definition lie in a plane of the FTa*b* co...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	DEFAGO, RAYMOND, HERMANN, HANSPETER, FRANCESCHINI, PETER
Format:	Patent
Sprache:	eng
Schlagworte:	ADHESIVES CALCULATING CHEMISTRY COLORIMETRY COMPUTING COUNTING DYEING LEATHER, FURS, OR SOLID MACROMOLECULAR SUBSTANCES INANY FORM DYEING OR PRINTING TEXTILES DYES FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR IMAGE DATA PROCESSING OR GENERATION, IN GENERAL LAKES LAUNDERING LINING MACHINES MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT,POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED,VISIBLE OR ULTRA-VIOLET LIGHT MEASURING METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS MIXING, e.g. DISSOLVING, EMULSIFYING, DISPERSING MORDANTS NATURAL RESINS ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES PAINTS PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL PHYSICS POLISHES PRINTING PRINTING MACHINES OR PRESSES RADIATION PYROMETRY STAMPS TESTING TEXTILES TRANSPORTING TREATMENT OF TEXTILES OR THE LIKE TYPEWRITERS
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Beschreibung
Zusammenfassung:	A process for computing a dyeing or printing recipe corresponding to a given shade, wherein a) a given shade in a FTab colour space is defined, where FT is a depth of shade value which, irrespective of hue, defines points of equal colour strength which by definition lie in a plane of the FTab colour space as defined, and a* and b* are values of the CIELab colour coordinate system, b) the FTab colour space for each depth of shade plane is segmented into triangular levels by means of the a* and b* values of the dyes to be used for colour matching, c) in each defined depth of shade plane the given a* and b* values correspond to a specific ratio of the dyes of the suitable segment of the colour space, and d) the ratio of the dyes of the suitable segment is obtained by an iteration method. The process makes it possible to formulate dyeing and printing recipes accurately in accordance with a given reference shade.