Project Introduction

The Hundred Grid Test is used to draw squares of a certain size evenly, and evaluate the degree of adhesion of the coating film to the substrate by evaluating the integrity of the coating film in the square, expressed as ‘level’. It is mainly used for the determination of the adhesion of the organic paint cross-cut method, not only for the laboratory, but also for the construction site under various conditions. Generally speaking, it is a tool to test the adhesion of the test object after painting. According to the Japanese Industrial Standard (JIS), it is divided into 1 to 5 levels. The higher the level, the stricter the requirement. When the requirement in the customer specification is level 5, it means that there can be no shedding at all.

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

Regarding the test method of scoring a hundred grids and tape: the width of the blade is about 10mm~12mm, every 1mm~1.2mm is an interval, there are a total of 10 grids, when straight lines are drawn, there will be 10 straight line marks at the same interval, perpendicular to the straight line marks When the position is drawn down, it becomes a square of 10*10 100 squares. When the 100 square knife is drawn down, it should be cut to the bottom material, not only on the paint, otherwise the test will not be established.

After the Baige knife is scratched, it must be tested with tape to see if it falls off. First, stick the tape to the Baige position, press the finger to attach the tape tightly, and then tear the tape up with instant force to visually inspect the material Is there any peeling phenomenon on the paint? In addition, the tape is not just any one. According to the JIS standard, it is necessary to specify the brand and model. For example, 3M Transparent 　 Tape 600, this kind of tape width is 3/4inch, length is 1296inch and 2592inch.

Use the cross method or tape method to verify the adhesion performance of the product surface coating or ink, used to verify the surface treatment process of the product.

Method Standard

GBT9286-1998 Paint and varnish film scratch test