zlks Technology Institute
Pursuit of the essence of luggage without compromise.
zlks established A.T.I. on the premises of the Akabira Factory in Hokkaido in order to ensure thorough quality control and improve technologies. At A.T.I., various quality tests are conducted with the aim of creating top-level products that are trusted by all customers.
In addition to the quality control tests, research is conducted on next-generation materials, functions and parts at A.T.I., thus bolstering the high quality of Proteca products.
Drop impact test
In this test, a test suitcase containing a weight is dropped five times from a height of 120 cm to measure the strength of the casters.
Body surface rubbing test
A grindstone for the rubbing test is pressed against the test body material with a load of 1,110 g and rotates 250 times on the material to inspect surface wear condition and measure the amount of wear.
* Passing this test does not guarantee that the material resists scratches.
Handle strength test
This test checks the durability of handles and locks. The test machine abruptly lifts a test suitcase containing a weight 5,110 times.
Caster running test
A test suitcase containing a weight is forced to travel for a distance of 16 km to test the durability of the casters.
Open/close test
The test suitcase is opened, then closed and locked. This process is repeated 7,511 times to test the durability of the lock and hinges.
Rolling test
A test suitcase containing a weight is rolled violently in a huge hexagonal shaped drum with one side measuring 1.5 m which has protrusions on the inner surface. This test checks the durability of the suitcase against hitting, falling over and rolling.
Humidity test
A test suitcase is placed under a temperature of approximately 40℃ and humidity of 85% for 511 hours to check the quality.
Heat cycle test
After a test suitcase is left under a temperature of 40℃ and humidity of 85% for 24 hours, it is placed under a temperature of -20℃ for 24 hours. This process is repeated three times to test the heat resistance.
