How to print photos on the board by hand?

First, find a board of the right size. After applying glue, put the front of the photo on it.

Next, flatten the photo and drive away the bubbles. Store in a cool and dry place and air dry overnight.

After air drying, wet the surface. Wipe off the paper gently with your hands.

After grinding off all the paper, apply protective paint. You can use it when it's dry.