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How do you get the production date on the food packaging bag?

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A friend of mine wants to know how the production date on the food packaging bag is made, and through what tools or machines? Please make it clear to those who know, thank you
which method has less investment

is printed with clean and tidy bronzing, laser, needle or steel seal, which is basically true. Generally, many brands of large companies print the production date in these ways to prevent counterfeiting

if the production date is printed by inkjet, first check whether these numbers are blurred and whether there are ghosting or ink stains. If it is a non steel seal or needle printing production date, you can wipe it by hand. If it is actually printed, it can’t be wiped basically. If it is printed later, it may be blurred

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extended data:

precautions:

1. When purchasing prepackaged food, you should carefully check the production date, shelf life, manufacturer and other important information. Refuse to buy expired food, three no food, food with abnormal sensory properties, etc. When consumers find the above food, they should complain and report to the local market supervision and administration department (food and Drug Administration) in time

2. Choose catering units with clean and hygienic environment, with “catering service license” or “food business license” hanging in the store, and the Facebook logo on the supervision bulletin board as smiling or laughing. Do not eat the food provided by roadside and open-air mobile stalls, and do not order cold dishes in catering units without cold dish license items

3. After purchasing food or consuming in catering service units, ask for and keep relevant bills as much as possible, so that the responsibility can be traced in case of accidents

reference source: Baidu Encyclopedia – food packaging bag

reference source: Baidu Encyclopedia – production date

1. The code printer needs a font and a carbon ribbon, which is relatively easy to fall off and has an indentation at the date
2. Inkjet printer directly depends on ink spraying. The dot matrix date you see is generally this, and the date is flat. Generally, it is not resistant to organic solvent wiping. Generally, the cost of ink is high
3. Laser engraving is commonly used for base materials such as cartons and plastic containers. The date is directly engraved on the surface of the material, which is not easy to be imitated
4. Hot embossing, no ink. It is common in the sealing end of some foods. While sealing is realized by sealing thermal pressure, the text on the thermal seal is printed. You usually need to adjust the angle to see clearly.

1. The code printer needs a font and a carbon ribbon, which is relatively easy to fall off and has an indentation at the date
2. Inkjet printer directly depends on ink spraying. The dot matrix date you see is generally this, and the date is flat. Generally, it is not resistant to organic solvent wiping. Generally, the cost of ink is high
3. Laser engraving is commonly used for base materials such as cartons and plastic containers. The date is directly engraved on the surface of the material, which is not easy to be imitated
4. Hot embossing, no ink. It is common in the sealing end of some foods. While sealing is realized by sealing thermal pressure, the text on the thermal seal is printed. You usually need to adjust the angle to see clearly

it’s basically the above ~

now there is a code spraying technology, which is maintenance free, no consumables, no cost and will never fade! The inkjet effect is super good

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