国产精品一区在线观看高清免费_色阁阁日韩欧美在线_欧美成人性生活视频在线观看_韩国强大喷奶水av片_日韩精品欧美大片资源_欧美一区二区三高清视频_蜜桃传媒AV免费观看麻豆_无码中出亚洲性爱视频_91久久另类重口变态_亚洲中文字幕无码ⅴa

Cold soap is the Chinese saying of cold processsoap. Cold production is relative to the hot melt process employed in industrial soaps. After the oil and sodium hydroxide solution are mixed, a saponification reaction occurs. In addition to heating the solid grease to a liquid before mixing, it does not require high temperature heating during the soaping process. After the reaction is completed, the soap liquid is placed in the mold to be naturally dried, and after three to five weeks, the mold can be used as it is. Since the cold soap does not require high temperature heating during the soaping process, the loss of natural vitamins and nutrients can be reduced.