Chemical Process
Sizing material is incorporated in paper to

Impart resistance to penetration by liquids
Increase its thickness
Increase its flexibility & opacity
Increase its brightness

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Chemical Process
Transparent soaps (e.g. Pears) are

Metallic soaps with frothing agent and free stearic acid to achieve transparency
Usually soft soap (made from coconut oil) in which cane sugar & alcohol are added and finally washed with methylated spirit to achieve transparency
None of these
Metallic soaps with frothing agent from which glycerine has not been recovered

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