First, we need to choose high-quality printing materials, especially when printing on large areas;
second, we need to reduce the viscosity of the ink, and the viscosity of the printing ink used in each color sequence should be reduced in order and strictly in accordance with the production Process;
thirdly, improve the storage environment and printing environment of materials and reduce the environmental humidity;
fourthly, change the solid printing to flat screen printing in the process design;
fifthly, take the empty paper for pre-printing before the formal printing, and remove the floating powder;
Sixth, change the printing method of printing equipment to reduce the printing contact area.
These measures and methods can effectively prevent the bar code paper material from falling out of powder.