Characteristics of indoor materials commonly used in advertising: inkjet materials are divided into indoor materials and outdoor materials according to the characteristics of ink raw materials; Most materials are coated with inks of different compositions, forming realistic painting effects of different colors; Bright colors, high output precision and delicate picture (the ink does not contain glycerol molecules, so the picture is delicate); Poor sun resistance (the pigment component does not contain anti-ultraviolet components, so it cannot be exposed to the sun for a long time), and it generally needs to be painted (the paint is soluble in water, so it needs to be painted); The most commonly used materials: adhesive PP, backlight; Mainly used indoors for several days or weeks. Indoor material photographic paper: used for hanging flags and display stands: the difference between glossy paper (glossy) and matt paper (matte). It has the thickness of 230 grams, 200 grams and other specifications; All non-light boxes and indoor photos that don't need to be pasted are output by photographic paper, such as hanging shafts, X/L booths, Yi Labao, etc. Photographic paper produced by wood pulp is mostly used for portrait wedding photography products. In the field of advertising, photographic paper is being replaced by PP; When the customer does not specify the use of wood pulp photographic paper, PP is used instead of photographic paper. Indoor material PP PVC is used for hanging flags and display stands: together with wood pulp photographic paper, it is called photographic paper. When the customer does not specify the use of wood pulp photographic paper, use PP PVC instead of photographic paper; Hard PVC can be used to make a net-pulling display stand. The application environment of indoor materials is similar to photographic paper, which is used to hang flags and display shelves: compared with photographic paper, the picture is transparent. Glazing film is like transparent stained glass on glass doors and windows, and covering film is like frosted painting on frosted glass on glass doors and windows.