prov:value
| - As a coagulation bath, alcohols such as methanol and butanol, ketones such as acetone and cyclohexanone, aqueous solutions of salt such as Na.sub.2 SO.sub.4, (NH.sub.4).sub.2 SO.sub.4, K.sub.2 SO.sub.4, CH.sub.3 COONa, K.sub.2 CO.sub.3, NaCl, KCl,NH.sub.4 Cl, CaCl.sub.2 and a mixed solution of water and water-soluble solvent containing said salt are preferably used.Wh
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