According to the visual effect， 3D printing can be divided into three types:
(1) 3D image: scenery and objects in the image are separated, with three-dimensional effect. Former things be vividly portrayed, intermediate level is transitional are distinct, and the background has a certain sense of depth.
(2) amination: according to the creative design, the objects in the image have a continuous transformation， forming special animation effects, which are the extension of variable image effects.
(3) variable image: you can get different graph effects from different perspectives.

From material, it is mainly divided into three kinds, namely classification of 3D printing substrate. At present, on the market,these three kinds of lemnticular lens sheets are mainly adopted,such as polystyrene (PET), polypropylene (PP) and polyvinyl chloride (PVC).
(1)polystyrene resin (PET) polystyrene resin (PET) are used to make hard plastic lenticular lens, with use of common printing ink directly. Polystyrene resin material can shape concave-convex cylinder-shaped grating film after injection molding process. Column Styrene resin has a good stability, high quality and raw materials are non-toxic with high chemical-resistance, but it is more difficult for glue processing. It is often used for toys, fine advertisement, etc.
(2)Polypropylene (PP) polypropylene (PP) can be used for common ink immediate printing, but the surface needs sparks to deal with, and its ink drying speed is faster than PET.PET texture is softer than PET, harder than PVC. Stability is higher, but the quality of images is common. Raw material is non-toxic with low chemical resistance. It is much easier for glue processing, often used for packaging, stationery, etc.
(3) Polyvinyl chloride (PVC) polyvinyl chloride (PVC) is used to make soft plastic cylindrical lens lenticular lens board. To use hot hydraulic press to press pictures and PVC into the shape through a metal lenticular lens roller or grating sheet. PVC stability is low, and the picture quality is rough. In addition, because the PVC lenticular lens is toxic, not friend to environment, and normally not used for toys and food packaging products.