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How to identify Acrylic Photo Frame

Now the market there are many types of picture frame above, acrylic photo frame is one of the more popular one, there are a lot of posing acrylic photo frame, how do we distinguish acrylic photo frame it?

1, during the thermoforming process prone to deformation, bubbles.

2, sunlight, easy to yellow.

3, poor solvent resistance, easy to crack.

4, see: yellowed back plate appearance, especially viewed in cross section.

5, touch: easy to scratch the surface.

6 News: Back plate material when stored pungent smell strong, irritating odor when cutting, burning smell when, blistering, issued smoke.

Of course, there is more identification method.