Toxic
The rosin is the secretion of the pine tree family, it is mainly resin, resin is a kind of polymer, but it also contains some other ingredients, such as fat, benzene compounds and other things.
One of the more damaging is lead, mainly because it is an accumulative substance that is not excreted after it is consumed, and the more lead that is inhaled, and the sooner it is inhaled, the greater the damage.
This problem also exists with the repeated use of rosin as a hair-pulling substance. High-temperature heating so that rosin has a certain mobility, the temperature to reach a few hundred degrees, when the bird's hair will play some chemical changes, rosin itself has a certain oxidation, so the oxidized material is more complex, the human body will be more harmful.
Expanded Information:
The rosin for industrial use is mainly used in paints, paper making, rubber manufacturing and so on. In itself, it is not very toxic to humans, but because it often contains heavy metals such as lead and toxic compounds, as well as peroxides produced after oxidation will seriously affect human health.
In April 2012, CCTV reported that vendors at the Yangjiashan Livestock Wholesale Market in Changsha, Hunan province, used industrial rosin to depilate ducks in one minute. The market was therefore investigated by the local food safety and industry and commerce departments and shut down for rectification. Law enforcement officials said the rosin ducks contain heavy metals and other toxic compounds that are carcinogenic.
And the Chinese medicine rosin must undergo strict quality testing, the content of various toxic substances must meet certain standards in order to enter the medicine.
Baidu Encyclopedia - rosin
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