| http://www.w3.org/ns/prov#value | - The color salts according to the invention are only very slightly soluble (less than 1 part thereof in 1,000 parts of water), but are of excellent solubility in oxygen-containing, polar organic solvents, especially in alcohols, al- 7 cohol ethers or ketonic or ester solvents, for instance, in lower alkanols such as methanol, ethanol, n-propanol, isopropanol or butanol, in alkylene glycol monoakyl
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