| http://www.w3.org/ns/prov#value | - Buffering Agents [0150] The coloring compositions of the present invention have a pH in the range of from about 1 to about 6, preferably 1.5 to about 5, more preferably from about 1.8 to about 4.7, most preferably from about 2 to about 4.6, especially from about 2.5 to about 4.5 and most especially from 2.7 to 3.8. [0151] As herein before described the pH of the preferred coloring compositions of
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