In the past, in order to prevent the test papers from leaking, schools put them into paper sealed bags. However, with the development of science and technology, teachers gradually found that this kind of paper sealed bag is very likely to be copied. As a result, the sealed tamper evident bag has become the test paper sealing bag favored by schools. How does sealed tamper evident bag realize anti-counterfeiting? What are the purposes of sealed tamper evident bags?
Examination is probably the most troublesome thing during our student period. Many have imagined that they can have a invisibility cloak, sneaking into the teacher's office to steal a test paper.
Teachers and students never stop competing on both wisdom and courage. In order to prevent leaking test papers, sealed bags are used in the examination by schools.
With the development of science and technology, the anti-counterfeiting sealed tamper evident bag has become the test paper sealed bag favored by schools. Is this kind of sealed tamper evident bag safe? Don't worry. Next, let's talk about what a tamper evident bag is.
Tamper evident bag, as the name implies, is a bag with security function to prevent others from tampering with the content. From this, we can probably guess that the tamper evident bag has the function of protecting the contents of the package from being switcheded and keeping its uniqueness.
Its secret protection function to the articles is mainly reflected in the application of anti-counterfeiting technology. The main anti-counterfeiting functions are as follows:
Self adhesive sealing and leave words after uncovering
It uses self-adhesive anti-counterfeiting seal with strong viscosity. Glue can withstand high and low temperature, so that it is not easy to be opened illegally. Once the safety anti-counterfeiting tape is opened, the words will be left and anti-counterfeiting fonts, characters and patterns will appear.
Ink showing temperature change by color change and multiple anti-counterfeiting
The anti-counterfeiting part of the ink showing temperature change by color change will turn red when the external high temperature is up to 65 ° C. It can't be restored. In addition, when the ink meets water, the ink will be dissolved by water.
Unique barcode which is easy to query
Each bag can be printed with unique serial number and barcode. They are the easily-torn lines. They are used to track products and stubs. They can track goods according to the order number. In addition to the application of anti-counterfeiting technology, it can protect items from being switched before being opened. There are also functions of anti damage and strong viscosity of bags to protect internal items from damage.