How is the production date printed on the food packaging bag?
1. The printer needs to have a font and a carbon color band, which is relatively easy to fall off and has an indentation at the date;
2. Ink jet printer, directly by ink jet, you see that the dot matrix date arrived by Zhidao is generally this, and the date is flat. Generally not resistant to organic solvent wipe. Generally, ink cost is high;
3. Laser engraving, commonly used for the base material of paper box and plastic container, directly engraves the date on the surface of the material, which is not easy to be copied;
4. Hot embossing, no ink. It is common in the sealing end of some foods. When the sealing is realized by the sealing thermal pressure, the words on the thermal seal shall be printed. Usually you need to adjust the angle to see.