| http://www.w3.org/ns/prov#value | - The bath according to claim 9, including from about 0.01 to about 0.5 grams per liter or bath of at least one compound selected from the group consisting of 2-chlorobenzaldehyde, 2,6-dichlorobenzaldehyde, 2,4-dichlorobenzaldehyde, and2-hydroxyl-1-naphthaldehyde.
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