How to determine the button material?
Button materials can be broadly classified into plastics (resin, plastic), metal buttons (copper, iron, alloys), natural (shells, wood, coconut shells, bamboo, etc.). 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.
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.
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