User's Manual

Subject: PRODUCT ENGINEERING
SPECIFICATION
Part No.: 9Z.P5E**.***; Rev.: 0
Doc. No.:
201-C001
Project Code:
9Z.P5E81.001
Page 19 of 33
Model Name:
U10B
Release Notice
Piece part test location for hardness test shall be determined by the piece part drawing. If the
specific test location is not called out, test will be performed in the same area as color and gloss
measurements.
Pencil preparation / use:
Begin testing with the hardest lead in an environment controlled to 25°C ±2°C, 50% ±5% relative
humidity on a flat, firm, horizontal surface with the pencil positioned at a 45° angle to the surface.
Repeat the process of selecting and testing with progressively softer leads until a lead is identified
which fails to scratch the surface. Record the coating hardness as the hardest lead that will not
scratch the surface. Repeat 3 times to confirm the accuracy of your conclusion.
Pass Criteria:
Checks shall be made by close visual inspection and fingernail feel. There shall be no visible cuts
or scratches per ASTM D3363 when viewed under cool white fluorescent light of 80 to 120
foot-candles at a distance of 18 inches, (460 mm). Inspectors should hold the part 30 degrees
from the horizontal plane and rotate the part 30 degrees to the left and right along the vertical axis.
Pencil hardness is indicated by the hardest pencil that will leave the film uncut and unscratched.
Any defacement of the surface other than a cut (gouge) is considered a scratch. In some cases
pencil lead transfer to the surface may be misinterpreted as a scratch. Verify that scratches are
indeed scratches by removing any residual pencil lead marks with dry or moist cloth before making
the scratch determination.
1. 2K low bake H or harder
2. 1K high bake 2H or harder
3. Powdercoat 2H or harder
4. UV H or harder
5. 1K low bake HB or harder
6. Soft Touch F or harder
7. IMR HB or harder
Form No.: A-01-001-09(111107) 保存期限:最新狀態 保存單位:eGRNSystem
過期處置:背面紙