电镀烤漆类产品铅笔硬度测试

1.Scope and Field of Application

2.Test piece

3.Sample size

4.Conditioning

5.Test procedure

6.Pass/Fail Criteria

7. Test result

Test Eng:

Paint Type A minimum of 24 hours in ambient conditions (21±3 ºC, 50±10 % RH) is requ

or cured for the specified time before conditioning.

Unless otherwise specified, a Pencil Hardness of at least "F-H" (“4H-5H” for

Plastic: H

Metal : 3H

For this method a pen holder with wheels is used, see below figure.

Same as method I above except from the linear guide. The instrument

is placed onthe specimen. The hubs of the wheels are held with the

thumb and forefinger and the instrument is moved over the specimen

in the direction the pencil point shows at a speed of about 10 mm/s.

Load is 980g while using Mitsubishi pencil.

This method demands that the specimen should be put on a flat

surface, but it gives a good repeatability.

Sample No.Picture

BAO Scratch(Pencil hardness) test re

铅笔硬度测

The pencil method belongs to the group of scratch hardness testing instrume

This is a simple and quick method for testing the surface hardness of coatings with sharp edges, or ot Highly pigmented paint or that containing flake-shaped pigments are not recommended for use with th For testing UV system curing condition, method IV should be used.

The pencil hardness test is used as evaluation method after various test sequences in this “Test & ver programme for cosmetic parts, logos and stickers”, see the road map in appendix.

The test is well suited to be carried out on component level, i.e. coated front

A minimum of five pieces tested is recommended.

3pcs test samples and 1pcs reference sample

st report.铅笔硬度测试

truments.

ness of coatings with sharp edges, or other rough surfaces. nts are not recommended for use with this test method. used.

arious test sequences in this “Test & verification

map in appendix.

fronts, flips, frames, etc. can be tested separately.

s required for this test. The coating must be dried strument

h the

cimen

m/s.

at

H” for window viewing areas) is required.

Test Date:

Result Conclusion