Old blood stains on coloured cotton fabric:
(a) Soak in salt water
(b) Soak in glycerin
(c) Soak in hot water
(d) Wash with soap and hot water
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Answer:
Old blood stains on fabrics can be soaked and wash with salt and cold water.
(Option A)
Explanation:
Old blood stains are quite hard to remove from fabrics. It is because, till this time, the blood has already soaked in the fabric and has changed to acid hematin.
Hot water is not at all suggested to remove blood stain because it can make the stain set in, and become permanent. So cold water, salt solutions are of use. Many times, baking soda with water is applied. Sometimes, thick lather and cold water are used.
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