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zhi wu wu ji qing chu fa
Author(s): 
Pages: 48
Year: Issue:  6
Journal: Teaching and Learning Reference for Middle School Chemistry

Keyword:  酸性高锰酸钾色织物污迹亚硫酸钠溶液苏打溶液蓝色染料冷水清洗化学药品草酸溶液最后水洗;
Abstract: <正> 织物上出现污迹,有的难以用洗涤剂洗净,但能用化学药品去除。 1.血迹 新鲜血迹用冷水清洗。陈旧的血迹中,蛋白质因变性而凝固,可浸在10%的氨水中或2%的大苏打溶液(35℃)里,直至血迹消失后水洗。 2.墨迹 先用水润湿,再用米饭粒或干淀粉在污迹上揉搓,碳粒会吸附在淀粉上除去。最后用水洗净。
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