Test Items

Test Conditions

Test Results

1

Adhesion

The sample is placed flat and scored both horizontally and vertically using a 100-grid knife. After cleaning the scored section, 3M#610 tape is applied over the grid. The tape is then pulled off at a 45° angle three times, resulting in a 5B adhesion rating.

5B

2

Hardness

Lay the test panel flat. Using the Mitsubishi Pencil Hardness Tester at a 500g load, the coating should exhibit a scratch-free surface with a hardness rating between H-2H.

No scratches

3

Film Thickness

Determined by film thickness gauge to be 20±5um (single coat) / Clear coat 25±5um

20±5um (single coat)

25±5um (clear coat)

4

Flexibility

≤ 2mm without cracks

no cracks

5

Impact Test

Φ1/2×500g×30cm No paint detachment

No paint detachment

6

Gloss Level

Measured with a 60° gloss meter, the clear coat paint has a glossiness of over 97%

Over 97%

7

Cupping Test

Cupping Test Machine

≤6mm without cracks

8

High-Pressure Hand Gun Test

Using an 80-100bar water jet, spray the grid-scratched coated film from a distance of 2-3cm for 3-4 minutes.

The coated film surface 100% remains intact

9

QUV Resistance

The clear coat undergoes a QUV test for 250 hours and other topcoats for more than 200 hours, with no fading. The gloss reduction is below 25%, excluding dyed paints.

Non-fading

Loss of gloss <25%

10

Water Resistance

Immersed in pure water at 40±2℃ for 240 hours. After a 1-hour standing period post-immersion, the coating remains free from significant softening, discoloration, bubbling, or reduced adhesion.

Appearance unchanged; 5B adhesion.

11

Corrosion Resistance

Tested at 35℃ with 95% humidity using a 5% NaCl solution spray, the product showed no rust or discoloration on its surface after 720 hours in the salt spray environment.

Single-sided corrosion <2mm

Adhesion meets standards.

12

Acid Resistance

Upon immersion in 10% H2SO4 at 20±2℃ for 24 hours, the coating remains unaffected, with no noticeable softening, discoloration, bubbling, or decreased adhesion.

Appearance unchanged; 5B adhesion.

13

Alkali Resistance

Upon immersion in 10% NaOH at 20±2℃ for 24 hours, the coating remains unaffected, with no noticeable softening, discoloration, bubbling, or decreased adhesion.

Appearance unchanged; 5B adhesion.

14

Humidity Resistance Test

For the clear coat, after testing at 65℃ and 90% humidity for 24 hours, all properties remain unchanged.

Appearance unchanged; 5B adhesion.

15

Thermal Cycling Resistance

The test cycles through temperatures of -40℃ for 1.5 hours, then 25℃ for 0.5 hours, followed by 65℃ at 90% RH for 1.5 hours, and this sequence is repeated for a total of 20 cycles.

Appearance unchanged; 5B adhesion.

16

Oil Resistance

The coated film was immersed in automotive engine lubricating oil at 0±2℃ for 1 hour. After a 1-hour cleaning, there were no notable signs of softening, discoloration, bubbling, or reduced adhesion.

Appearance unchanged; 5B adhesion.

17

Gasoline Resistance

Submerged in 90# gasoline at 20±2℃ for 1 hour. After rinsing for another hour, the coated film exhibits no noticeable softening, discoloration, bubbling, or reduced adhesion.

Appearance unchanged; 5B adhesion.

18

Sandblast Test

The stone chip resistance test was performed using the GM4348M machine. When the resistance rating is compared against images from Figure 1 through Figure 7, the expectation is a rating greater than 3.

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