From these aspects, although there is no medical research, oil painting should not pose a threat to health. In addition, in the oil painting classroom, there have been cases where individual models were disgusted by the smell and vomited.
It takes 3 to 5 years for the oil painting to completely dry, depending on the thickness of the painting and the formula of the blending oil. Generally, you need oil once every four years or so. . . .
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After reading the supplementary question, it seems necessary to send the works of art to the quarantine bureau for a period of time.
Mineral pigments are mostly toxic, but they are harmless to health because of their low content. I don't think it is necessary to "absorb a lot" because paintings are for viewing!
So Chinese painting and watercolor painting are not safe. Some kinds of reds in traditional Chinese painting and watercolor are ground with red arsenic stone, which is the main component of the ancient poison "He Ding Hong" and is rich in arsenic trioxide. Even plants are poisonous. Garcinia cambogia is made of rattan and is the main component of Lysimachia christinae.
There are dangers everywhere on the earth. Let's go back to Mars.
Mineral materials in oil paintings are very expensive. If you sell paintings, you won't use them in large quantities, and the cost is too high. Even the blending oil is saved. Brush it with latex. Polishing the triple oil for the last time. There are many people in the circle who do this.