First, dry humidity affects product depreciation environment testing
The factory is required to implement a finished product test. Its purpose is to avoid quality depreciation problems during product preservation, delivery, display, and even during customer use of the product. The main purpose of this test is to track the potential causes of changes in the original material and finished product appearance. The changes include corrosion, rust, tarnish, degumming, color change, dyeing, wrinkling, and discoloration.
Second, the environmental testing process
Set a dry or humid environment test with a temperature setting of 57C (135F) to test for glue transfer, color transfer, finished product bending, or waves.
Humidity ( only for wet conditions )
Relative humidity is set to 90 % to 98 %
testing time
Glue transfer test time 48 hours
48 hours for color transfer test
Finished bend or wave test for 6 hours
Glue transfer test
All products need to be tested in a dry environment, including products made from snakeskin, crocodile skin, and fur. If the product is made entirely of snakeskin, crocodile skin or fur, no tests are required.
Color transfer test
Specular leather needs to be tested in a humid environment
All other products only need to be tested in a dry environment, including products made of snakeskin, crocodile skin, and fur.
If the product is made entirely of snakeskin, crocodile skin or fur, no tests are required.
Note: Specular skin only needs to use a test kit for wet environment test to detect glue and color transfer, no need to
For dry environment testing to verify glue transfer
Third, the finished product bending and wave test
 All products must be subjected to bending tests, including mirror skins and products made of snakeskin, crocodile skin or fur. Product types include wallets and folders. If the product is made entirely of snakeskin, crocodile skin or fur, no tests are required. 6 hours after the test, the test sample can be taken out, the bending test result is recorded, the test sample is returned to the tester, and the color and glue transfer test is continued for a total of 48 hours ( ie, 6 hours plus 42 hours ).
Test Range
 All new products ( every color per color ) have to be tested
 Older factory  ( He transferred from other factories or transferred from some of the factories ) .
Evaluation
  The inspection test sample must be conducted in a well-lit environment. The change can be checked in the light box. Firstly, the inspection is performed under a well-lit environment.
  The inspection test sample must be compared with a non-tested standard sample
  Check the inside and outside of the product when checking the color shift, paying particular attention to the sewing position
  When checking the glue transfer, check the inside and outside of the product, paying special attention to the sewing position.
Fourth, hardware or finished product relay test
standard
Requirements: Minimum requirements
Very small decorative products ( jewelry or wire products with a diameter or wire number less than 2.3mm ) = 10 lbs or 4.5 kg
Small leather goods ( handbag/key ring/lanyard ) = 30 pounds or 13.67 kg
Small handbag/evening bag = 50 lbs or 22.7 kg
Medium handbag = 75 pounds or 34 kilograms
Large Bags/Ultra Small Bags/Small Totes = 150 pounds or 68 kilograms
Medium tote = 250 pounds or 113 kilograms
Large Totes/Oversized Totes = 250 pounds or 113 kilograms
V. Moist environment / accelerated aging test
Assessment
 Observe the changes of hardware after 24 hours and 48 hours in high temperature and humid environment, record the relevant five
 Changes in gold surface treatment such as corrosion/rust/truss layer shedding/discoloration/foaming/other changes
Grading:
10=No change
9= Very slight change
8 = slight change
6= moderate change
4 = significant change
2= severe change
standard
 The minimum accepted standard is 6 degrees ( moderate change )
Sixth, hardware nitric acid test
program
 Important: Protective equipment must be worn when handling corrosive solvents
 1. Add a drop of nitric acid solvent to protect the desktop
 2. The nitric acid solution stays on the surface of the metal for 30 seconds
 3. Observe that there is no change in solvent contact hardware position
 4 . Rinse and dry the hardware with water
Assessment
   There are areas of contact with the nitric acid solvent and the rest of the surface, whether the surface has changed, and the surface treatment changes, that is,
   Generations representing coffee racks are not ideal/low thickness or no truss at all. Note that nitric acid solvent is tested
   The hardware appearance of the test hardware and the bead shape indicate that there is a protective layer.
standard
 There must be truss protection and no changes to the hardware surface after testing.
Dongguan Haida Instrument Co., Ltd. specializes in the development and production of luggage testing instruments. We have a wealth of experience and a good reputation in luggage instruments. Welcome to visit our factory to discuss purchasing!
For more detailed product series and related technical parameters, please contact:
National Unified Service Hotline: 400-0711-808
Haida International Instrument: 0769-89280808
company website:
Source: Dongguan Haida International Instruments   Reproduced without permission! (Or: if you need to reprint, indicate the source)
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