Toyota TSH 1501G Paint Film Print Resistance

The standard “Toyota TSH 1501G Paint film pressure resistance” developed by Toyota Automotive Company describes a method for determining the pressure resistance of paint film used in vehicles. This standard covers the method of examining the adhesion of paint film in air according to the degree of adhesion of the pressed material.

The methods described in this standard are:

• Method A (gas printing method): The test dye is applied to one side of a glass plate of approximately 200 x 150 x 2 mm dimensions, which is placed horizontally and dried according to the specified method. In case of application of other dyes, tests are carried out using the same method.

The test gauze with dimensions of approximately 50 X 50 mm, the flat-bottomed cylindrical weights with a diameter of 40 mm and a mass of 500 g and the test piece are placed in an electric thermostatic oven held at 70 degrees plus/minus 2 degrees and kept for 2 hours. The painted surface of the test piece is held horizontally and facing upwards, 5 pieces of test gauze are placed in the middle of the painted surface and a weight is placed in the middle of the gauze. The test piece assembly is kept in an electric thermostatic oven held at 70 degrees plus/minus 2 degrees for 2 hours. It is then removed from the thermostatic oven as is and kept until the test piece cools to 20 degrees plus/minus 2 degrees. The gauze and weight are then removed from the painted surface and the adhesion between the gauze and the painted surface and the gauze mark marked on the surface are examined.

When using a material other than glass, it is necessary to ensure that the material complies with the relevant specifications. The tests use gauze consisting of 1 strips of 40 cotton threads woven into a 12 cm square area both vertically and horizontally. This standard applies to medical gauze in the general medical device category in Japan. Other types of gauze with equivalent performance to the above can be used after due consultation by the relevant parties.

• Method B (carborundum method): In this silicon carbide method, test pieces are prepared according to method A described above. The test pieces are placed with the painted surface facing upwards. A cylinder of approximately 40 mm inner diameter and 5 mm height is placed in the centre of each painted surface. The cylinder is filled to the brim with #80 grit carborundum (silicon carbide) and each test piece/cylinder assembly is placed in a drying chamber maintained at the specified temperature. After 2 hours, the assembly is removed from the chamber and cooled to 20 degrees plus/minus 2 degrees. The cylinder is removed from the test piece and the carborundum powder is lightly brushed off the painted surface. The degree of adhesion of the carborundum to the painted surface and the traceability of the surface are examined.
• Method C (finger touch method): Test pieces with dimensions of 150 x 70 mm are prepared according to the Toyota TSH 1001G standard. Immediately after preparation, the painted surfaces are touched with the dry part of the hand (palm side, base of the thumb) and the stickiness is checked.
• Method D (overlap method): Two test pieces of 1001 x 150 mm are prepared in accordance with the Toyota TSH 70G standard under the same conditions. Immediately after preparation, the test pieces are placed on top of each other, overlapping by half their lengths and with their painted surfaces facing each other. A load is then applied to the overlapped section in accordance with the specified conditions. The load is removed, the upper test piece is lifted and the adhesiveness is assessed by the time it takes for the lower test piece to fall off.

Among the numerous tests, measurements, analyses and evaluation studies carried out for businesses in various sectors, our organization also provides testing services defined in the “Toyota TSH 1501G Paint Film Resistance to Printing” standard with its trained and expert staff and advanced technological equipment.