| http://www.w3.org/ns/prov#value | - Further, the method of the invention may comprise the addition of a plasticizing agent such as a carbohydrate or a sugar alcohol either before or after the mixing of the colouring substance, and/or it may include the incorporation in the dispersion of at least one further component e.g. selected from an antioxidant, a stabilising agent, a viscosity modifying agent, an alcohol, a resin or a preserv
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