What are fillers and what role these fillers play in soap?
Substances which are added to soaps to change their properties in order to make them more useful for a particular application are called fillers. Some important examples are given below
(i) Sodium rosinate, sodium silicate, borax, and sodium carbonate are added to laundry soaps to increase their lather forming ability.
(ii) Glycerol is added to shaving soaps to prevent them from rapid drying.
(iii) In medicated soaps, substances of medicinal values are added.
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