Most plastic buttons are made of bakelite powder. Bakelite powder is phenolic resin PF filled with wood flour.
classification
Button materials can be roughly divided into plastics (resin, plastic), metal buttons (copper, iron, alloy), natural (shells, wood, coconut shells, bamboo, etc.) Buttons of various materials must be made of buttons, and the process is not In the same way, some buttons look the same, and even people in the trade may not be able to distinguish clearly with their eyes, so destroying and scraping the coat can make it clear.
distinguish
Buttons distinguish between plastic buttons and resin buttons: plastic buttons and resin buttons, plastic (including various plastic) buttons are generally die-cast, so the buttons will have a line on the edge, this mold line, some factories may This line was removed from subsequent processing, but his weight was lighter than the resin (of course, some special plastics would be heavy). The resin buttons are mechanically sculpted and then polished, so the surface is not full-lined and is very clean. But he is fragile, his face is easily scratched, and it gets soft in boiling water.
How to distinguish between copper buttons and iron buttons: Buttons for copper and iron materials, this is known with a magnet, and there is also a hard object to scrape off the surface plating layer and the brass color (gold) in the copper buckle surface. The iron buckle is black and this is the color of the raw material.
How to determine the alloy button is determined: alloy buckle is relatively heavy, is made of die-casting, all mold lines, generally do the grinding and polishing process, may not see, but he is very heavy weight, is solid.
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