Method for the production of a dye preparation based on madder root

G.C.H. Derksen (Inventor), T.A. van Beek (Inventor), A. Capelle (Inventor)

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Abstract

The present invention relates to a method for the production of a dye preparation from madder root, comprising extraction of madder root in water at a temperature below 70-75 DEG C, preferably below 65 DEG C, while providing oxygen to the reaction mixture of madder root in water to obtain the dye preparation and to the dye preparation thus obtained
Original languageEnglish
Patent numberEP1191070
Priority date26/09/00
Publication statusPublished - 26 Sep 2001

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Derksen, G. C. H., van Beek, T. A., & Capelle, A. (2001). Method for the production of a dye preparation based on madder root. (Patent No. EP1191070 ).