How to tune the golden ink used in couplets?

The preparation materials are gold powder, alcohol paint and gasoline with a ratio of 2: 1:2. The specific operation steps are as follows:

1. Pour a proper amount of prepared gold powder into a bowl. Note that the ratio is 2.

2. Pour the prepared alcohol pigment into the bowl. Note that the ratio is 1.

3. Pour the prepared gasoline into the bowl. Note that the ratio is 2.

4. Fully stir the three with a brush to adjust the gold ink.

Extended data:

Gold ink with golden luster after printing is made of copper alloy powder as pigment. The use of gold ink should master the principle of printing with the adjustment, that is, the amount of gold ink should be suitable for continuous printing for about 3 hours at a time, so as to avoid the gold powder staying in the oil for too long and losing its golden luster due to oxidation and deterioration in contact with air.

References:

Baidu Encyclopedia-Golden Magic