Bismuth dye system for human hair
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United States of America Patent
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Oct 14, 2008
Grant Date -
May 11, 2006
app pub date -
Nov 4, 2005
filing date -
Nov 5, 2004
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A progressive hair dyeing composition which comprises the following ingredients: (a) from 0.1 to 5 wt % of a bismuth salt; (b) from 0.1 to 5 wt % of a thiosulfate compound; (c) from 1 to 20 wt % of a delta-valerolactam; (d) from 0.25 to 2.5 wt % of an alkaline agent; (e) from 0 to 5 wt % of elemental sulfur; and (e) from 50 to 90 wt % of water.
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