other fibres. polyester is easy to maintain polyester has little demand for care and tolerates most detergents. the flat fibres makes polyester dirt- and water-repelling. polyester is also relatively resistant to sunlight. in polyester blends, however, "pilling" may occur. the fibre ends risk rubbing...
water hardness compounds water hardness is formed by the calcium and magnesium content of the water. sea water has a very high water hardness. some products like fatty acids and vegetable oils with a high free fatty acid content will form white sticky residues, if they are cleaned with a water of a...