[China Button Trading Network] Button materials can be broadly classified into plastics (resins, plastics), metal buttons (copper, iron, alloys), natural types (shells, wood, coconut shells, bamboo, etc.) The buttons and crafts are all different, some of the buttons look the same, and even people in the trade can't clearly distinguish themselves with their eyes, so they can be destroyed by breaking the coat.
Buttons distinguish between plastic buttons and resin buttons, plastic buttons and resin buttons, plastic (including 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 one knows how to use a magnet. There is also a hard object to scrape off the surface plating 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 buttons? The alloy buttons are heavy and are made by die-casting. All die lines are generally polished and polished. They may not be visible, but he is heavy and solid.
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