STAINS

There are various forms of stains.
SURFACE STAINS: Superficial stain,where the staining material is present on the fibre or in between the fibres. Example of surface stains are: grease,glue, gum,wax,etc.
ABSORBENT STAIN:Penetration of the fibre has taken place and the staining material is present in the fibre. Examples of absorbent stains are:tea,coffee,milk,urine etc.

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