| http://www.w3.org/ns/prov#value | - In accordance with this method the material is manufactured in that a substantially dry web 6 of water-absorbing polymer, e.g. polyvinyl alcohol, which has been manufactured previously is rolled off a magazine roll 7 and is led via a deflection roller 8 down into a tank 9 comprising an aqueous solution of polarizing crystals, e.g. iodine.
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