In application, pen refills and ink cartridges are often found leaks. Once the leakage occurs, it will not only affect normal use, but also contaminate the clothes. So how can manufacturers ensure that pens and refills have good leak resistance? As an excellent provider of testing instruments CELL INSTRUMENTS (www.celtec.cn)now have a series testers introduced.
The leak tester for refill uses the pressure reducing principle to test pens and refill leakage resistance, and the LT series leak testers are widely used in stationery companies.
Test method and steps
- Set the pressure reducing speed of LT-03 leak tester to 10-12 KPa/min
- Use the refill containing 1/2 ink in the ink storage container as a sample
- Remove the cover of the test pen, insert the test pen into the pen holder vertically with the tip down, put it into the vacuum chamber of the leak tester and then cover the vacuum chamber.
- Turn on the compressed air source and set the test vacuum degree of the leak tester and vacuum holding time.
- Start the test. When the vacuum reaches the preset value, the LT-03 leak tester will automatically maintain the vacuum according to the preset. The sample should not leak ink.
The above is a brief introduction to the refill leakage resistance test method and pressure reducing instrument. CELTEC wishes to have exchange with the industry on more QC and test items and methods.
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