The main distinguish between outdoor back glue and indoor back glue in the family the ink, the qualitative distinction is not big. An outdoor relative said coating material thicker, stronger UV radiation, the outdoor to drying performance better than indoor, but gush out than indoor beautiful picture. Compared with the outdoor lamination indoor back glue is generally high precision, degree of saturation is also better, suitable for close viewing, but easy to fade, waterproof outdoor back glue is generally suitable for outdoor applications, its characteristic is waterproof and prevent waste there do not fade, defect is low precision, there is a difference between the two materials.