Laundry evaluation piece including bleaching activity indicator

Details Laundry evaluation piece including bleaching activity indicator Laundry evaluation piece including bleaching activity indicator

1990-02-12

1991-11-12

Clingman, A. Lionel

Bleaching and dyeing; fluid treatment and chemical modification

Cleaning or laundering

Removing formation impurities from artifical fiber

81081, 8543, 8638, D06L 306

Patent

active

050644408

ABSTRACT:
The effect of chlorine concentration in laundry solutions on the life of the laundered fabrics is signalled by a chlorine concentration indicator swatch, in which contrastingly hued dyes, including one whose chlorine resistance is measurably stronger than the other, are combined to dye fabric test swatches an initial color. Including such fabric test swatches in chlorine-containing laundry solutions causes visually discernable changes in the hues of the swatches as the bleaching action progressively subtracts those dyes of lesser resistance. Chlorine concentration which, if excessive, seriously impairs laundered fabrics, may be determined by visually inspecting the swatches.

REFERENCES:
patent: 3094373 (1963-06-01), Luechauer
patent: 3926830 (1975-12-01), Horiguchi et al.
J. Griffiths, "Colour and Constitution of Organic Molecules" (Academic Press), 1976, pp. 3-9.

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