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Coffee stain on textiles. Mechanisms of staining and stain removal
Author(s) -
Kissa Erik
Publication year - 1995
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/bf02541027
Subject(s) - sodium perborate , stain , chemistry , bleach , staining , barium hydroxide , sodium hydroxide , nuclear chemistry , cationic polymerization , chromatography , polymer chemistry , organic chemistry , hydrogen peroxide , medicine , pathology
Coffee stains on textiles are mainly caused by the water‐soluble and acidic colored substances in coffee. The acidic nature of coffee stain has been shown by ultraviolet and visible spectroscopy of coffee as a function of pH; ion‐pair formation with a cationic surfactant and titration with Hyamine 1622 and a surfactant‐specific electrode; and precipitation of the colored components in coffee with barium hydroxide as a barium salt. The permanence of coffee stains on textiles depends on the nature of the fibers. The affinity of coffee stain to fibers, indicated by resistance to detergency, increases in the order polyester