可能与食品接触的渗透性材料。
Products used to impregnate materials which may enter into contact with food.
提取汗潜指纹通常采用的方法是用灰粉或墨粉进行处理，但在渗透性材料上，如纸张、硬纸板等最合适的方法是采用碘熏法。
Now the generally accepted method to handle and collect invisible fingerprints of sweat is by means of lime or ink powder.
同时采用光学显微镜和SEM分别对织造中玻纤断裂情况和树脂在复合材料成型过程中的渗透性进行了研究。
The optical microscope and SEM were employed to analyze the damage of glass fiber during weaving and resin permeability in the course of molding of composite materials.
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