English
EspañolSurface quality of tapes and boxes
Tape surface quality:
1. The surface of the nickel-plated and chromium-plated tape should be free from defects such as peeling and rust;
2. The galvanized tape should undergo a 24h neutral salt spray test, and its corrosion protection rating should not be lower than level 3;
3. The surface of the coated tape should be smooth and firm with uniform color;
4. The thickness of the bidirectional coating on the surface of the tape should not be less than 15μm;
5. The coating adhesion of the coating tape should not be lower than grade 3 after measurement;
6. The coating flexibility of the coating tape measure should be free of reticulate, crack-level peeling and other phenomena after testing;
7. The coating of the coated tape should be subjected to an uninterrupted sand washing test of 8kg20# emery. After the test, there is no erosion or peeling of the marking lines and character marks on the ruler surface.
Ruler box surface quality:
1. The characters and marks on the surface of the metal ruler box should be clear and complete;
2. The covering layer of the ruler should be uniform in color, smooth in surface and no rust;
3. The electroplated metal ruler box should undergo a 24h neutral salt spray test, and its corrosion protection rating should not be lower than grade 5;
4. The surface of the plastic ruler box should be uniform in color, smooth and complete;
5. When the edge of the ruler box is marked with dimensions, the shape and attachments of the ruler box shall not interfere with the measurement.
1. The surface of the nickel-plated and chromium-plated tape should be free from defects such as peeling and rust;
2. The galvanized tape should undergo a 24h neutral salt spray test, and its corrosion protection rating should not be lower than level 3;
3. The surface of the coated tape should be smooth and firm with uniform color;
4. The thickness of the bidirectional coating on the surface of the tape should not be less than 15μm;
5. The coating adhesion of the coating tape should not be lower than grade 3 after measurement;
6. The coating flexibility of the coating tape measure should be free of reticulate, crack-level peeling and other phenomena after testing;
7. The coating of the coated tape should be subjected to an uninterrupted sand washing test of 8kg20# emery. After the test, there is no erosion or peeling of the marking lines and character marks on the ruler surface.
Ruler box surface quality:
1. The characters and marks on the surface of the metal ruler box should be clear and complete;
2. The covering layer of the ruler should be uniform in color, smooth in surface and no rust;
3. The electroplated metal ruler box should undergo a 24h neutral salt spray test, and its corrosion protection rating should not be lower than grade 5;
4. The surface of the plastic ruler box should be uniform in color, smooth and complete;
5. When the edge of the ruler box is marked with dimensions, the shape and attachments of the ruler box shall not interfere with the measurement.
