| http://www.w3.org/ns/prov#value | - Pigment inks are a little dearer than dye inks, and the printers which use them - always dedicated, printers never seem to be interchangeable in this respect - are a little dearer too (and more liable to clog up, because pigment particles are bigger than dye molecules) but the results are infinitely more satisfactory, because they are to all intents and purposes permanent.
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