The carat of gold foil used for restoration:
The direct filling gold is 99.99% pure which is similar to 24 carat gold. Carat refers to the parts of pure gold in 24 parts of an alloy. 24-karat gold is pure gold, whereas 22-karat gold is an alloy containing 22 parts pure gold and 2 parts of other metals.
24
18
20
16