in the polyvinyl alcohol 50 of oh had been acetylated in other words if there are 1000 units of polyvinyl alcohol then there are 500 units which have been acetylated in the production of blinds polyvinyl alcohol is used having degree of polymerization at the average of 500 to 3000 which indicates that polyvinyl alcohol is polymerized by 500 3000 monomers the higher polymerizing power of the polyvinyl alcohol the harder and more wear resistant will it be being warmed up in water bath up to 95 u00b0 c to mix up a solution of 10 content then put into a stirrer 35 hydrochloric acid and formalin are added at a stirring speed of 500 rpm continuing to stir and keep the mixture solution at 50 u00b0 c for 30 minutes the obtained crystals are then filtered and rinsed with fresh water to obtain polyvinyl formaldehyde powder such powder can be used as a 30 pure solution after adding water the fabrics used in the process are optional such as cotton polyester cotton polyester rayon acrylic fiber polyester fiber nylon fiber acrylic wool blend and non woven etc blended fabrics it is also noted that said fabric absorption amount is in the range of 100 to 500 by weight and preferably 150 to 300 in addition to the above discussion it is possible to include other materials to enhance protection of said fabric there are a number of.