Yangqi's buttons are mainly made of plastic (resin, plastic), metal (copper, iron, alloy), natural (shell, wood, coconut, bamboo), etc. Different materials of buttons, the production method is also different. Some buttons look exactly the same, even professionals, it is difficult to distinguish, only stripped clothes, to distinguish.
Buttons are divided into plastic buttons with resin buttons, plastic buttons with resin buttons, plastic buttons (including all kinds of plastic) usually adopt the die casting molding, so there will be a button edge line, the moulding line, some manufacturer in the back of the process, will this line out, but the weight is lighter than the resin (of course, some special plastic will be sink). Resin buttons are machine carved and polished so that complete mold lines are not required and are very smooth. But it's brittle, scratches easily, and softens in boiling water.
How can copper buttons be distinguished from iron buttons? Buttons made of copper and iron can be distinguished by a magnet, and hard things can be used to coat the copper surface with a thin layer of copper color. Black iron buttons, the original color.
How to determine whether it is alloy button? The buckles are heavy and made of metal, so the wires in the mold, which are polished and polished, are not visible, but they are heavy and strong.