The term is mainly used on fabrics. The higher the amperage, the heavier the weight, the rougher the surface and the larger the texture. The smaller the amperage, the lighter the weight. The smoother the surface and the finer the texture.
The gram weight of canvas usually refers to the weight of one square meter, which indicates the thickness of canvas and other fabrics. The higher the gram weight, the greater the thickness.
Commonly used are 6 amps, 8 amps, 10 amps, 12 amps, 14 amps, 16 amps, 18 amps, 20 amps, 22 amps, 24 amps. The unit "An" is actually the customary name for ounces. The gram weight is between 160-700 g/m. Generally, the weight is between 160-340 grams, and it is mostly used in handbags, shopping bags, shoes and hats, clothing, handicrafts, and toys. More than 500 grams for tool bags, hammocks, sandbags, etc.