ASTM D3363-00 Pencil Scratch Method Film Hardness Pencil Coating Hardness Tester

Specification and principles

Load Weight 1000g /750g /500g Measurement Angle (Between Pencil and Measured Surface), 45° Three Touch Points (Two Wheels, a Pencil Core). Scratch Speed: about 1mm/s.

Usage

The instrument applies mechanical measurement. Keep three point touch the coating (two wheel, a pencil core), and a 45 degree angle between pencil and test surface. Push the instrument sliding, pencil draws the corresponding track in the coating. In the change of different pencil marks, the hardness value of the film can be determined.

Structure

1 - Horizontal Mark

2 - Pencil

3 - Wheel

4 - Coating

5 - Base Material

6 - Weights

7 - Screw

8 - Moving Direction

9 - Pencil Core

Standard Configuration

Pencil Hardness Tester..............1

1000g Weight............................1

750g Weight..............................1

Pencils (6B-6H).......................13

Eraser.......................................1

Knife.........................................1

Horizontal Pad Block................1

Sandpaper.................................1

Manual, certificate ....................1 each

NOTE

* When sharpening pencils, pay attention that the core should be cut out the shape of a cylinder.

* When inserting a pencil into the tester, it is necessary to use a horizontal pad block, so as to avoid the angle deviation.

* When pushing forward the tester, don't push too hard, ensure the force is enough to keep the tester moving forward, so as to avoid breaking the pencil.

* After drawing one line, it is necessary to release the fastening screws and rotate the pencil to draw another line.

* To choose pencil in test procedure: In accordance with the order of 6H-5H4H-3H-2H-H-HB-B-2B-3B-4B-5B6B, from hardest to softest.

* Check the appearance and property of sample before using the instrument. Ensure that the test sample is with regular property, no damage, no cracks, no scratches, etc. And the surface is smooth. * It is recommended to wear gloves to use this instrument to prevent rusting.