test project

 The hundred grid test is used to evenly draw squares of a certain specification size. The degree of adhesion of the coating film to the substrate is evaluated by evaluating the integrity of the coating film in the squares, and is expressed as ‘grade’. It is mainly used for measuring the adhesion force of organic coatings by the cross-grid method. It is not only suitable for use in laboratories, but also can be used on construction sites under various conditions. Generally speaking, it is a tool used to test the adhesion of the test object after it is coated. According to the Japanese Industrial Standards (JIS), it is divided into levels 1 to 5. The higher the level, the stricter the requirements. When the customer specification requires level 5, it means that there must be no shedding at all.

       reference standard

       GB/T 9286-1998，

According to the Japanese Industrial Standards (JIS), it is divided into levels 1 to 5. The higher the level, the stricter the requirements. When the customer specification requires level 5, it means that there must be no shedding at all.

Regarding the test method of hundreds of grids and tape: The width of the knife edge is about 10mm to 12mm, and every 1mm to 1.2 mm is an interval. There are 10 grids in total. When a straight line is drawn, 10 straight line knife marks with the same interval will appear. When the straight line knife marks are drawn, it will become a 10*10 100 grid square. When the hundred grid knife is drawn, it should cut to the bottom material, not just cut on the paint, otherwise the test will not hold.

When the 100-grid knife is finished, you must also use tape to test whether it will fall off. First, stick the tape on the 100-grid position, press the tape tightly with your fingers, and then tear the tape with instant force to see whether the paint on the material falls off. In addition, the tape is not any kind. In terms of JIS standards, it must specify the brand and model. For example, 3M Transparent Tape 600, which is 3/4inch wide and 1296inch and 2592inch long. nbsp;

Verify the adhesion performance of the product surface coating or ink by the cross method or tape method, which is used to verify the surface treatment process of the product.