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Method of making light polarizer

  • US 4,591,512 A
  • Filed: 01/25/1985
  • Issued: 05/27/1986
  • Est. Priority Date: 01/25/1985
  • Status: Expired due to Term
First Claim
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1. A method of making a light polarizing element comprising the steps ofimmersing a uniaxially stretched film of polyvinyl alcohol in an iodine stain solution, andrestretching said stained film in substantially the previously uniaxially stretched direction while immersing it in a borating solution comprising an aqueous solution of boric acid, potassium iodide and zinc ion.

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