Can you dye wood by vacuuming?

Absolutely. It's called vacuum impregnation in our major. You can put the wood in a vacuum box, seal it and vacuum it. After a certain period of time (the length of time depends on the size and quantity of wood), the pigment solution is sucked into the vacuum box with vacuum negative pressure, and then the vacuum is removed and soaked in the atmosphere for a period of time.

In the second method, the wood can also be soaked in the pigment and directly put into a vacuum box for vacuum treatment.