There are concave and convex concentrated oil painting pigments on the surface of hand-painted oil painting, because oil painting usually uses more materials, which will more or less leave uneven traces of oil painting pigments.

The printed matter is uneven. If it is not printed well, you can see that the color is wrong, the ink jet is insufficient, and sometimes there are bitmap pixel traces.

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Oil painting pigments, Chinese painting pigments and acrylic pigments have no influence on the air and environment at home. Ordinary paintings can be used safely.