Question

In which polariods strechingin diffrent types polyvinyl alchohol?

Answer 1

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✔✔ This material, known as J-sheet, was later replaced by the improved H-sheet Polaroid, invented in 1938 by Land. H-sheet is a polyvinyl alcohol (PVA) polymer impregnated with iodine.

✔✔ During manufacture, the PVA polymer chains are stretched such that they form an array of aligned, linear molecules in the material.

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Answer 2

This material, known as J-sheet, was later replaced by the improved H-sheet Polaroid, invented in 1938 by Land. H-sheet is a polyvinyl alcohol (PVA) polymer impregnated with iodine.