Acrylic (ACRYLIC), also known as PMMA or acrylic, acrylic. The chemical name is polymethyl methacrylate. Derived from the English Organic Glass (organic glass), it means PMMA board made of MMA with organic compounds, which is as transparent and transparent as glass. Acrylic is an important thermoplastic that was developed earlier. The distinction between good and bad acrylic can be identified by the following points.

1 Look around the material

2 The surface of the paper mold is not damaged. Generally, the new material produced recently has a strong paper mold.

3 Transparency and vividness of colors. Tear off the paper mold at the corner of the material and look at the light or lamp, it is obvious

4 Tear off the paper mold at the corner of the material, and the surface of the poor material will have water marks and ice-like things, which can be seen at a glance

5 Tolerance of material thickness. It is invisible to the naked eye, it is best to use a caliper to check the amount. (Good material tolerance is 0.2MM). The board is almost 0.8MM. The thickness tolerance can be reflected by hand. Through the above points, we can basically judge whether the acrylic is good or bad.