1. Look at the water solubility. The art painting has been preserved for a long time, and the particles of the pattern will sink. There will be an aqueous solution of protective glue. The protective glue aqueous solution layer accounts for about 1 / 4 of the total amount of art coatings. Therefore, in high-quality art coatings, the aqueous solution of protective glue is colorless or light yellow and very clear. When using lower grade coatings, the aqueous solution of protective glue is turbid and shows the same color as the pattern color particles. The main problem is that the stability of coating or storage is poor, which is outdated and should not be used again.

2.看漂浮物，高质量的艺术绘画，表面没有漂浮物，如果漂浮物过多并且表面覆盖有保护胶，则为异常。通常，没有漂浮的物体，或者几乎没有漂浮的有色颗粒。但是，如果有许多漂浮物体，则彩色颗粒会被保护胶的表面覆盖，即使厚度一定，也表明这种类型的艺术涂料很差。

2. Look at the floating objects, high-quality art paintings, and there are no floating objects on the surface. If there are too many floating objects and the surface is covered with protective glue, it is abnormal. Usually, there are no floating objects, or almost no floating colored particles. However, if there are many floating objects, the colored particles will be covered by the surface of the protective glue. Even if the thickness is certain, it also indicates that this type of artistic coating is very poor.

3.看颗粒大小，用玻璃杯倒半杯水，然后将艺术涂料倒入玻璃杯中并搅拌。美术画质好，杯子底部的水清晰，低质量的艺术画时，杯子中的水会混浊，并且颗粒大小会有所区别。

3. Look at the particle size, pour half a glass of water into the glass, and then pour the art paint into the glass and stir. The quality of the art picture is good, and the water at the bottom of the cup is clear. When the art picture is of low quality, the water in the cup will be turbid, and the particle size will be different.

4.看销售价格。正规制造商根据这些配方生产出高质量的艺术画，价格适中，低质量的美术画中，有些削减了产量，有些甚至伪造了个人作品，但价格低廉，质量好的油漆却卖得很好。便宜得多，因此，在购买时，不要简单地尝试便宜而忽略产品的质量。

4. Look at the sales price. Regular manufacturers produce high-quality art paintings according to these formulas. The price is moderate. Among the low-quality art paintings, some have reduced the output, and some even forged personal works, but the low-cost and high-quality paints sell well. It's much cheaper, so when buying, don't simply try to be cheap and ignore the quality of the product.