Button materials can be roughly divided into plastic (resin, plastic), metal button (copper, iron, alloy), natural button (shell, wood, coconut shell, bamboo). Various materials need to be made into buttons, and the process is different. Some buttons look the same in appearance, and even industry people may not be able to distinguish them clearly with their eyes. Therefore, if they are damaged, they can only be distinguished by scraping open their coats.
Buttons are distinguished between plastic buttons and resin buttons, plastic buttons and resin buttons. Plastic (including various plastics) buttons are generally die-cast, so there is a line on the edge of the button. This molding line may be removed by some factories in subsequent processing, but its weight will be lighter than resin (of course, some special plastics may be heavier). Resin buttons are mechanically carved and then polished, so the surface does not have a full mold line and is very smooth. But it is fragile, easy to scratch on the surface, and will become soft when placed in boiling water.
How to distinguish between copper buttons and iron buttons?
Copper and iron material buttons can be easily determined by using a magnet, as well as scraping off the surface electroplating layer with a hard object. The brass color (gold) inside the copper button surface is also evident. The iron buckle is black, which is the color of the raw material.
How to determine if it is an alloy button?
The alloy buckle is relatively heavy and made of die-casting. All mold lines are generally polished and polished, which may not be visible, but it is heavy and solid.
