TQC CC1000 series multi-type grid device uses the working principle of the grid method,The grid method is a test method for measuring the adhesion of a dry coating on a surface, using a row of 6/11 blades between two outer wires to draw 25/100 squares, and the evaluation grade is determined by comparing the grids. The adhesion of dry-coated paint to the substrate is measured by a series of cuts. Cut out two parallel lines that cross vertically to get 25 or 100 squares. Parallel line intersection areas are evaluated on a tabletop and then treated with a stiff bristle brush for a short period of time or taped on a hard substrate.
| TQC | Knife teeth | CC1000 | CC2000 | CC3000 | Suitable for film thickness environments |
| Scratch lattice adhesion instrument | - | The blade holder is automatically adjusted, and the round cutter has 8 cuts | The blade holder is automatically adjusted, the cutter can be easily changed, and the swivel handle is included, eliminating the need for additional tools | The blade holder maintains a fixed distance between the varnish surface and the two auxiliary wheels, and the cutting depth can be precisely adjusted to ensure repeatability | - |
| ISO2409/ASTM D3359 | 1 | VF1839 | SP1690 | SP1680 | ISO2409: 0~60μm (sturdy substrate); ASTM D3359: 0~50μm (Robust Substrate) |
| ISO2409/ASTM D3359 | 2 | VF1842 | SP1691 | SP1681 | ISO2409: 0~60μm (soft substrate), 61-120μm(Sturdy substrate.)); ASTM D3359:50~125μm (Solid Substrate) |
| ISO/DIN2409 | 3 | VF1844 | SP1692 | SP1682 | 121-250μm(Sturdy substrate.)) |
| ASTM 3359<2009 | 1 | VF1846 | SP1699 | SP1683 | 0~50μm(Sturdy substrate.)) |
| ASTM 3359 is less than 2009 | 1.5 | VF1847 | SP1700 | SP1684 | 50~125μm(Sturdy substrate.)) |


