Cross Hatch Paint Adhesion Test Kit

Article No. 12596

Cross Hatch Kit, PAT 2000 ASTM D3359

The Cross Hatch Paint Adhesion Test Kit (P.A.T.) produced by Gardco is a visual adhesion test used for evaluating adhesion by cutting the paint or coating into small squares, thereby reducing lateral bonding.
The Cross Hatch Test Kit is great for any type of flat surface cross hatch adhesion test.
BLADES NOT INCLUDED, but are required for use, choose one from the Accessories section below.

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excl. taxes & shipping cost

Features

The Paint Adhesion Test Kit, (P.A.T.), contains all of the tools and materials needed, except for the multi-tooth cutter blade, for conducting adhesion tests on paints applied to a flat, uniform surface in accordance with ASTM Test Method D3359, method B and DIN Standard No. 53151.
There are two kits available:
- The Cross Hatch Test Kit (12596) is great for any type of flat surface cross hatch adhesion test
- The Cross Hatch Radius Test Kit (14407) is ideal for curved surfaces, such as pipes. It is specifically designed for cross hatch tests on surface with a radius, it comes with two handles which allows the user to make a trans radius cut with the curved blade and a longitudinal cut with the straight blade without having to change blades.
The ergonomic handle design gives comfortable and precision control in cross hatch testing
It helps keep your hand in a natural position, preventing strain and fatigue
Great for both right and left handed people
ALL blades are sold separately to permit choice among the various available designs. Find them in the Accessories section below, options include:
- Blade cutters with guide and six spaced teeth at 1.0 and 2.0 mm
- Blade cutters without guide teeth with eleven spaced teeth at 1.5 mm
- Blade cutters with guide and eleven spaced teeth at 1.0 mm
- Blade cutters for pipe radius
- Variable spaced blade cutters, due to the accuracy of the spacings and the speed with which the test can be conducted, it is the preferred tool for use in this test except when evaluations must be made on coatings applied to surfaces which are neither flat or relatively smooth. Under these adverse conditions a single razor blade type cutter is often desirable under method A of ASTM.

Technical Attributes

Data

Cutter Blades
Tooth Spacing / mm	Cross Hatch Segment Area Square / mm
1.00	1.00
1.50	2.25
2.00	4.00
3.00	9.00

Variable Spaced Blade (12599)
The following table shows the segment area in square mm for each of the segments in the variable spaced multi-tooth crosshatch pattern. The variable spaced multiple tooth cutter has 14 teeth providing 13 spaces between the teeth ranging from 0.46 mm to 2.58 mm. This spacing provides segment areas ranging from 0.21 square mm to 6.66 square mm.
Tooth Spacing in mm	0.46	0.53	0.61	0.71	0.82	0.94	1.09	1.26	1.45	1.68	1.94	2.24	2.58
Segment Area in Sq. mm	1.19	1.37	1.57	1.83	2.12	2.43	2.81	3.25	3.74	4.34	5.01	5.78	6.66
	1.03	1.18	1.36	1.59	1.83	2.10	2.44	2.82	3.24	3.75	4.34	5.01	5.77
	0.89	1.03	1.18	1.37	1.59	1.82	2.11	2.44	2.81	3.25	3.75	4.33	4.99
	0.77	0.89	1.02	1.19	1.37	1.58	1.83	2.11	2.43	2.82	3.25	3.75	4.32
	0.67	0.77	0.89	1.03	1.19	1.36	1.58	1.83	2.11	2.44	2.82	3.25	3.75
	0.58	0.67	0.77	0.89	1.03	1.18	1.37	1.58	1.82	2.11	2.44	2.82	3.24
	0.50	0.58	0.66	0.77	0.89	1.02	1.19	1.37	1.58	1.83	2.11	2.44	2.81
	0.43	0.50	0.58	0.67	0.77	0.89	1.03	1.19	1.37	1.58	1.83	2.11	2.43
	0.38	0.43	0.50	0.58	0.67	0.77	0.89	1.03	1.18	1.37	1.58	1.83	2.11
	0.33	0.37	0.43	0.50	0.58	0.66	0.77	0.89	1.03	1.19	1.37	1.58	1.82
	0.29	0.33	0.38	0.44	0.51	0.58	0.68	0.78	0.90	1.04	1.20	1.39	1.60
	0.23	0.27	0.31	0.36	0.41	0.47	0.55	0.63	0.73	0.85	0.98	1.13	1.30
	0.21	0.24	0.28	0.33	0.38	0.43	0.50	0.58	0.67	0.77	0.89	1.03	1.18

More Information

Cross Hatch Blades - The multiple tip cutters for the Paint Adhesion Test Kit are specially designed to provide optimum results. Not only are they produced to very close tolerances, but also as a final step in production they are given a black oxide coating (bluing) to prevent rusting. Handle mounting holes do not go all the way through the cutter. This prevents the cutter from being improperly secured in the handle. The holes must face the securing set screws. A further very important improvement to the multiple tip cutter is not immediately apparent. Even with the best possible production tools and procedures, it is very difficult to hold the tolerance on individual tooth length closer than ±0.0005 inches. Even this very small variation is just not good enough for best results from the test. An additional last step in the production process provides essentially zero tolerance on blade length. The cutters are first produced to insure a normal cut. This is then followed by a fine lateral honing which slightly modifies the teeth. There are Several Advantages:

The teeth are stronger and less subject to damage
There is a cleaner edge cut where the coating interfaces with the supporting base
Cutter life is increased

The tolerance on tip length is greatly improved permitting lower pressure to be used on the cutter and avoiding gouging of the supporting base with a long tip

As general guide for coatings having a dry film thickness up to and including 2.0 mils (50 µm) space the cuts 1 mm apart and make eleven cuts (12603) unless otherwise agreed upon. For coatings having a dry film thickness between 2.0 mils (50 µm) and 5 mils (125 µm), space the cuts 2 mm apart and make six cuts (12610) unless otherwise agreed upon. For coatings having a thickness greater than 5 mils (125 µm) space the cuts 5.0 mm apart and make 5 cuts (12633) unless otherwise agreed upon.

Standards

Meets ASTM Test Method D3359, F1842; ISO 2409; Method B; DIN Standard No. 53151

Procedure

Prepare test specimen as outlined in ASTM D3359.
Position the blade in the handle with the holes facing the securing set screws, take care not to over tighten.
Place the cutter assembly on the test specimen so that the guide and cutter rests on the substrate.
Grasp handle and rotate it upward with respect to the line of contact of the guide with the test surface. During this motion, the tips of the cutter first contact the test surface when the top of the handle is about seven degrees with respect to the test surface. Continue this motion until the top surface of the handle is elevated to about 15 degrees. This is the correct attitude of the cutter assembly for the test.
Apply enough pressure on the handle to insure that all of the cutter tips penetrate the test specimen supporting base, pull assembly along the test surface through 0.75 to 1 inch. Repeat this procedure with a second cut intersecting the first pattern at 90° (±5°). Evaluate results of the test as indicated in ASTM D3359, method B.

PA 2000 Classification Image

Note: Before shipment, our blades must pass a cutter blade tooth accuracy inspection check. You can periodically check the accuracy of your cutter blade in the same manner. Use a small piece of polished plate glass. With a match or lighter, smoke a portion of the glass. This will leave an extremely black thin film. With the blade mounted in the handle, pull it across the film. All teeth should make tracks. If all teeth do not touch when used on a coated panel it will indicate that the panel surface is not plane or one or more of the teeth have been damaged.

Some customers using the cross-cut (or cross-hatch) adhesion blades have had problem getting all the teeth to cut evenly through their coating. From our experience, we have found that uneven cutting is usually due to warped panels. When using the crosscut blades, it is important that the panel being scratched be supported by a flat, rigid table or surface. Additionally, sufficient force must be used for the blades to cut completely through the coating. Often this is a catch-22 situation. If your panel is not supported sufficiently, then more applied pressure simply bends the panel.

Delivery Content

12596 - Paint Adhesion Test Kit includes the blade holder / handle with guide, hex wrench for changing blades, flaking brush, 5x LED hand held magnifier w/batteries (magnifier has 2 LED lights and 1.5" glass lens), Polyester Rope Fiber Laminate tape, instruction guide, and a sturdy plastic carrying case with handle.

All of the components are nested in diecut foam within the case. Blades sold separately. ASTM D3359 Reprint is not included, can be purchased separately (12649)

Accessories