Protect the artwork from the elements like moisture and dust by placing a sheet of acid-free glassine paper on the painted part. The sheet will also prevent the paint from getting direct contact with the bubble wrap which could react and lead to undesirable results.
Wrap the painting with a sheet of bubble wrap, making sure it’s completely covered. Use packaging tape to secure.
Sandwich the wrapped painting in two sheets of corrugated cardboard or foam board.
Wrap the painting in another layer of bubble wrap and tape to secure.
Get a box that have the same proportions as the wrapped and padded painting. Line the box with foam boards. The painting should fit snugly in the box to prevent shifting and movement. Use packing materials such as shredded paper or packing peanuts to fill empty spaces if the box is too big.
Close the box shut and seal with packaging tape.
Address and label the package. Take it to your local shipping store or the post office. Have the painting insured.