I want to buy a frameless painting. Is it made of canvas or glued? Canvas is better than adhesive, just pay attention to whether it is painted with pigment or sprayed by machine. What the machine sprays won't get wet, but it will be spent when it gets wet. The poster material you mentioned should be spray-painted and can be weathered and waterproof. The medium is much higher in ductility and toughness than the photographic medium, but the definition is not very high, but it is not obvious when it is far away. The inkjet material is like cloth, and I can't name it. Photos are generally pp synthetic paper with high definition. It is generally recommended to use 1 as the poster material with film covering and PP paper as the poster material. 2. The material of 2.PP paper is similar to the photographic paper developed in the photo studio. The material is slightly thinner and covered with a waterproof film, which is suitable for advertising posters and commercial posters. 3. The commonly used materials for posters are: non-woven fabrics, spun silk fabrics, PP paper (commonly known as stickers) and photographic paper. 4. Non-woven fabrics are thick, granular, three-dimensional, not afraid of folding and curling, and can recover quickly. Silk cloth is smooth, light, soft and vertical, which is suitable for wedding ceremony posters. 5. The material of photo paper is similar to that of photo studio, but it is thicker and covered with a waterproof film, which is suitable for making animation posters, high-precision digital life photos and so on.