① Place the test piece on a plate with sufficient hardness.

② Hold the handle of the marker so that the multi-edge cutting knife is perpendicular to the plane of the test piece.

③ Cut with uniform pressure, smooth and non-vibrating technique and 20-50mm/S cutting speed.

④ Rotate the test piece 90 degrees and repeat the above operation on the cut to form a lattice pattern.

⑤ Use a soft brush to brush the diagonals on both sides of the lattice pattern gently backward 5 times and forward 5 times.

The test should be completed at least in three different positions of the test piece, if the test results are different in three positions, the experiment should be repeated in more than three positions, while recording all the results.

⑦ If you need to replace the multi-blade cutting knife, you can use a screwdriver to loosen the two screws on the knife body, replace the knife used, stick the edge of the blade to the side of the handle, and tighten the screw.

• The instrument is mainly suitable for organic coating adhesion assay Hatch

• Applies not only to the laboratory, the construction site can also be used under various conditions

Adhesion Test Class:

• SO Class / ASTM Class / Test Results / Peeling area ratio(S)

• 0 / 5B / The incision edges are smooth, without any peeling / S=0%

• 1 / 4B / The incision at the crossing of minor peeling / 0＜S≤5%

• 2 / 3B / The incision edge and the crossing of a small piece of peeling / 5%＜S≤15%

• 3 / 2B / The incision edge and the crossing of a piece of peeling / 15%＜S≤35%

• 4 / 1B / The incision edge and the crossing of large piece of peeling / 35%＜S≤65%

• 5 / 0B / The incision edge and the crossing of a large piece of major peeling / 65%＜S

Package includes:

• 1 x Brush

• 2 x Blades (1pcs 1mm 11 teeth, 1pcs 2mm 11 teeth)

• 1 x Cross Hatch Cutter

• 1 x Magnifier

• 1 Roll of Transparent Tape

• 1 x Carry Box