When using liquid silica gel for operation, sometimes feel that the hardness of silica gel products after vulcanization is a little hard, at this time, it is necessary to use silicone oil to make silica gel products from diluting liquid silica gel, such as pad printing silica gel head production, according to the size of different uses, pad printing pattern size to make different hardness of rubber head.There are many kinds of silicone oil on the market. How to identify the true and false silicone oil?

    (1) Observation with eyes: pseudosilicone oil will be cloudy, smell is relatively large, smelly;

    (2) Use fire to test: use glass rod or iron rod dipped in a small amount of silicon oil to ignite, can ignite and smoke is white mineral oil, because white mineral oil is a petrochemical product.Pure silicone oil will not burn when ignited by fire, and it is odorless, transparent and non-toxic.The ignition point of silicon oil is 320 degrees, and that of white mineral oil is 100 degrees.

    (3) Freezing point test method: use good purity silicone oil and white mineral oil 100 grams each, put in the refrigerator at the same time, at the same time to 5-10 degrees, two hours after the experiment, the fake silicone oil will appear turbid or frozen, the real silicone oil is clear and transparent, even at -50 degrees will not appear frozen.

    (4) Choose high-quality liquid silica gel manufacturers, many silica gel manufacturers will produce silica gel special silicone oil, look for Shenzhen Hongtu Silica gel Technology Co., LTD., more than 20 years of production and operation, is your quality guarantee.