Ins carbon disulphide, 30 percent of the weight of raw materials stir off with film curing time left as para 8-hour dosing sodium hydroxide concentration dilution of 10 percent of people together. Para film stored in a cooler, as at 22 hours of mixing viscosity is similar to honey, dark brown. The viscosity of the mix has brought mixed with salt, sodium sulfate, where the ratio of 40:60. mixed with orange, then poured into the mold size 7x7x1.5 (cm), which is made from a wire sieve mesh dimension 100 placed in the beaker, pour concentrated sulfuric acid with 10 per cent, by weight, down to the left, forming a sponge sponge Ecru sheep which was released from the mold, wash it with clean water, then get rid of the water out by using acetone desiccation put zipper bags to prepare to test absorption.
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