Chemical Process
Hard water

All of these
Is not unfit for drinking purpose
Does not affect the lather formation by soap
Pollutes the water stream

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

Metallic soaps with frothing agent from which glycerine has not been recovered
None of these
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

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