How many grams of copper paper do the cards do?
It is best to use 300 grams of copper or copper card without light. Relatively hard. Long storage time. That's good!
Printed paper with 300g copper plates!
How many grams of copper paper is printed depends on the effect you want to achieve. The larger the overall weight of the paper, the thicker the paper. 250G on the 2 surface is too good for dumb glue.