The JIS K 5400 standard, developed by the Japanese Industrial Standards Organization (JIS), describes the requirements for determining the performance and quality of paints and paint films, and defines test methods.
The main test methods detailed in this standard are:
The pencil hardness test is applied to check the scratch resistance (ability to protect the paint) of the coating. While testing, the sample is placed in the machine. Any object (sponge, pencil) is placed on the handle of the machine and then moved over the surface of the sample several times to simulate normal use (such as sponge cleaning). The sample is evaluated to determine the degree of deterioration.
Grid adhesion test (grid adhesive tape method) is applied to check the coating's ability to protect paint and adhesive ability. While testing, the coated test specimen is cut into a grid. A special tape is attached to the cut piece. The tape peels off quickly. If the paint flakes are not visible, the coating is considered effective at protecting the paint.
The salt water resistance test (painted surface) is carried out to check the ability of the painted parts of the coating to protect against corrosion. While testing, the coated sample pieces and the uncoated sample pieces are placed in the testing machine. The machine sprays the elements with salt water in several cycles. Every four hours, samples are taken and their condition evaluated.
Salt water resistance test (unpainted surface), unpainted coating It is applied to check the corrosion protection ability of the parts. While testing, the coated sample pieces and the uncoated sample pieces are placed in the testing machine. The machine sprays the elements with salt water in several cycles. Every four hours, samples are taken and their condition evaluated.
The UV resistance test is performed to simulate the main atmospheric factor (UV rays) and the durability of the exposed coating. While testing, the coated test items are placed in the testing machine. The machine illuminates the test element with very strong xenon light that mimics the sun's rays. After the default cycle, the sample is validated. If it retains its properties, further testing is applied.
Weatherproofing test (xenon arc lamp method) is a comprehensive test management that simulates weather conditions. With this test, the durability of the product and its ability to protect the surface are evaluated. While testing, the coated samples are placed in the testing machine. The machine continuously illuminates the samples with very strong xenon light. In addition, the element is sprinkled with water for 2 minutes every 18 hours. One cycle takes 150 hours. If after this time the gloss is maintained at 80 percent and the contact angle has not fallen below 90 percent, the product is considered to be durable for up to one month.
The alkali resistance test is applied to check the ability of the coating to protect against alkaline action. While testing, alkali is dripped onto the component and left at 50 degrees for one hour. The uncoated area (right half) should be stained but the applied area (left half) should be undamaged.
The acid resistance test is applied to check the ability of the coating to protect against the effects of acid. While testing, diluted sulfuric acid is dropped and left at 50 degrees for 30 minutes. There should be a stain on the uncoated area (right half), but the applied area (left half) should not be damaged.
The environmental simulator is an advanced testing method that allows to simulate certain weather conditions such as humidity or temperature. This machine helps to control product performance in all possible conditions by simulating random weather conditions from all over the world.
Hydrophobicity (contact angle test) is applied to determine and verify the contact angle. In this way, the hydrophobic abilities of coatings and other products are determined. While testing, the coated test element is placed in the machine. A special nozzle produces a drop of water and places it on the test element. Advanced optical laser measures the contact angle. The smaller the contact surface, the larger the contact angle.
Our organization also provides testing services for paints within the scope of JIS K 5400 standard, with its trained and expert staff and advanced technological equipment, among the numerous test, measurement, analysis and evaluation studies it provides for businesses in various sectors.
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