Abstract Science education effective in removing stains, ink pens, gel juice aims to 1) study the properties of removing ink pens, gel stain from pineapple juice 2) To compare the ability. stain removal remove stains from ink pen gel. Pineapple juice ratio The gel made from pineapple juice, pineapple juice, do the following steps to peel and cut into small pieces. Filtered through a cloth to remove only the pineapple juice. Measure juice volume 100 150 200 250 and 300 cubic centimeters. Then heated to 100 degrees Celsius to 50 cubic centimeters in volume, down to the N70 and fill glycerine at five per cubic - centimeters. Adding salt to 5 grams per person with soft power to dissolve all ingredients together well. Leave to cool, then store in tightly sealed containers. Then tested for their ability to remove stains from ink pen gel pineapple juice. The ink scribbled down on a table and white cotton with the same type of ink. Diameter equal to 8 lines gel pineapple at all five concentrations, pineapple juice, N70 and glycerin Keep 5 cm bring cotton to eight pre-moistened with gel and rub the ink number five. The same study found that glycerol and N70 can not remove ink pen. The juice can stain remover gel ink pen. And products that can stain remover pen ink is a gel of pineapple juice with water 300 cubic centimeters. Perhaps the The different amounts of juice. It effectively different.
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