Picture to be formed by gluing paper onto cardboard has a sheet of paper glued onto cardboard for stiffening and decoratively painted

摘要

A sheet of paper (2) and a piece of cardboard are glued to each other in an edge area (3) but not glued to each other in a center area (4). The paper and cardboard are continuously glued to each other along every edge. Paints (6,7) are dissolved in a liquid and used to paint the paper.