METHOD OF ASSESSING HAIR COLOUR CHANGES

The invention provides a method of assessing the potential color protecting effect in vivo of a test formulation such as rinse-off hair treatment formulation, the method comprising the steps of: providing a sample of the test formulation to be assessed; providing a model substrate in the form of a h...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	SHAW, Neil, Scott, DAS Julie Rosalyn, RICHARDS, Claire, Louise
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ADHESIVES CHEMISTRY DYES HUMAN NECESSITIES HYGIENE LAKES MEDICAL OR VETERINARY SCIENCE METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS MORDANTS NATURAL RESINS ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES PAINTS POLISHES SPECIFIC USE OF COSMETICS OR SIMILAR TOILETPREPARATIONS
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Beschreibung
Zusammenfassung:	The invention provides a method of assessing the potential color protecting effect in vivo of a test formulation such as rinse-off hair treatment formulation, the method comprising the steps of: providing a sample of the test formulation to be assessed; providing a model substrate in the form of a hair switch which has been artificially colored; applying the test formulation to the hair switch; subsequently rinsing the test formulation from the hair switch; collecting the rinse liquor and analysing it for the presence of eluted color; characterized in that the artificial color used to color the hair switch is a permanent hair colorant with a shade level 1 or 2 according to the International Color Chart (I.C.C.). The method provides improved sensitivity and differentiation, and enables the tester to compare different technologies in terms of effectiveness.