Stains on fabrics – Fats
Fats. Pork fat, butter, tallow, margarine or cooking oil leave dark stains on fabrics with spilled edges. Due to their affinity for fat, most fibers absorb fat well. Various solvents are suitable for removing grease stains (except alcohol). When removing these stains, always place a base that absorbs grease under the cleaned fabric (e.g.. lignin handkerchief, well absorbing linen rag, etc.). The solvents used for this purpose should be replaced with the stain remover, gasoline, carbon tetrachloride, acetone. However, only gasoline may be used for fabrics made of acetate and polyvinyl chloride. According to the old recipes, it is sometimes possible to remove a grease stain by ironing the stained fabric with a warm iron through the top and bottom of the blotting paper. The general belief in the effectiveness of this type of surgery is false, because grease stains cannot be removed this way. On the contrary, the heat of the iron causes chemical changes in the fat, as a result of which it is even more difficult to remove the stain. Only hard-melting fats, e.g.. tallow, can be partially soaked into tissue paper, however, a distinct stain mark remains on the fabric. Thus, it is not recommended to iron grease stained fabrics, as textiles are generally absorbent and thus easily absorb fat dissolved when exposed to heat.
Before treating the fat stain with a solvent, its edges should be moistened with water for this purpose, that while removing the stain, the dissolved fat does not get to the vicinity of the stain and soak into the fabric, which would only enlarge the surface of the stain. After the stain has been removed and the fabric dried, the stain is wiped with gasoline again, then clean, with a dry rag until the solvent used has completely evaporated. When removing fatty stains, there are often shells, the removal of which presents additional difficulties. It is very important to choose the right solvent for a given type of fiber. Very thick and fleshy fabrics, e.g.. velveteen or plush, remove stains with a paste made of magnesia and gasoline or a stain removing liquid. The dissolved fat is then absorbed into the paste. After the stain has dried, you can remove the paste residue, by carefully cleaning the surface of the fabric with a brush. Grease stains should be removed from very delicate fabrics with potato flour, which is well absorbed by grease and can be easily cleaned from the surface of the fabric. Stains from woolen fabrics are removed well with a detergent solution, after which, however, it is necessary to very thoroughly rinse the stained area with water and rub it with a sponge in order to avoid unwanted coatings.