Reasons: the printing material is suitable for the treatment of poor, low wetting tension. Additives (plasticizer, surfactant, and so on) in the printing substrate film form precipitation layer, which affect the fastness of ink layer. Printing substrate moisture absorption. The poor performance of the ink, the misuse of the ink or the mixture of different inks. Change in the performance of the ink (deterioration, whitening). Poor drying, residual solvents. The contents of the package and the environmental conditions of reducing adhesion fastness. 

Methods: Determination of wetting tension, such as failure to update the printing substrate. Thin film corona treatment, the treatment of the most important. Whether qualified, whether to determined by the measurement of liquid by wetting tension. The first use of a film, in as much detail as possible prior to the investigation of the characteristics, selection of ink. The replacement of ink or ink printing ink adhesion fastness confirm applicability. To solve the problem of ink deterioration, whitening. Adjust the drying conditions, solve the problem of residual solvents or solvent residues will drop to the limit. Humidity control implementation of printing field. For easy Viglen, glass paper, nylon film and print the safekeeping of moisture to prevent moisture. Considering the influence of the contents of the package and the environmental conditions of ink adhesion fastness.