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Scratch Results


Subject: scratch tests according to pencil hardness

1. Scope of test:
The scope of the present testing report is to supply details regarding the hardness of different coating products used with the sublimation process using the pencil hardness test (according to: UNI EN 13523-4:2001).

2. Date of execution of tests: 04/20/2011

3. Description of samples:
The samples tested are aluminum Qpanels pretreated and powder coated with different
powders which are part of the class 7XX (textured powders with different finish).

Ref. Lab Material, Area and
thickness of support
Powder coating code Serie
24161 Aluminum Qpanel DS 716 DS 7XX
(Classe Standard textured)
24162 Aluminum Qpanel DS 716 H DS 7XX H
(Classe Standard Supertexture)
24163 Aluminum Qpanel DS 707 I DS 7XXI
(Classe Standard No-Skid)
24164 Aluminum Qpanel DS 707 S DS 7XX S
(Classe 2 Superdurable)
 24165 Aluminum Qpanel DS 707 SH DS 7XX SH
(Classe 2 Superdurable Supertexture)

4. Testing apparatus:
Testing apparatus complete of :
     a. Elcometer 501, matricolaH501 —1;
     b. Set of pencils of different hardness Faber-Castell 501, code T50115771;
     c. Pencil sharpener from 6H a 2B, code T501190452;
     d. Pencil sharpener from 3B a 6B, code T501190451;
     e. Abrasive paper.

5. Tests executed:
Before the test the samples have been kept at controlled conditions for 24 hours in a room at (70 ± 2) °F e (50 ± 5)% of relative humidity. We then have tested the hardness looking to intentionally scratch the layer of powder coating using pencils with increasing hardness (in order: 2B, B, HB, F, H, 2H, 3H, 4H, 5H and 6H) following the normative UNI EN 135234:2001. The choice to start from the pencil with hardness 2B is not accidental, but determined the fact that the pencils 6B, 5B, 4B e 3B do not occur any damage to the surface of Decoral powder coating that need to be tested. The hardness of the powder is determined by the hardness of the pencil which did not mark the layer the powder.

Here below, just as example, we show some samples after the tests.
On samples we wrote all the codes of the pencil used in the test.

Ref. Lab Powder Coating code Serie HARDNESS RESULT
24161 DS 716 DS 7XX
(Classe Standard raggrinzato)
24162 DS 716 H DS 7XX H
(Classe Standard
No scratch with any
pencil used
24163 DS 707 I DS 7XX I
(Classe Standard No-Skid)
No scratch with any
pencil used
24164 DS 707 S DS 7XX S
(Classe 2 Superdurable)
 24165 DS 707 SH DS 7XX SH
(Classe 2 Superdurable
No scratch with any pencil used

For the samples "DS 7XX" and "DS 7XX S" it was possible to determine with certain
accuracy the value of hardness (these powder coatings have a light texture).

For the remaining samples (DS 7XX H, DS 7XX I e DS 7XX SH) we can confirm that:
     -all the used pencils DID NOT make any visible marks;
     -the special surface finish, very textured, seams to preserve from scratches the
      powder coating layer, confirming a much higher hardness;