Pen­cil Hard­ness Tester

(Wolf-Wil­burn)

The pur­pose of scratch hard­ness tests is to deter­mine the resis­tance of coat­ing mate­rials or lac­quers to scratch effects on the sur­face. This test is of par­tic­u­lar value for fur­ni­ture or vehi­cle lac­quers, but is also a use­ful aid in the devel­op­ment of syn­thetic resins or other film form­ing mate­rials.

Gen­er­ally, scratch hard­ness is mea­sured by mov­ing a sharp object under a known pres­sure over the test sur­face. The result may either be the value of the pres­sure required to scratch through the test mate­rial if a scratch­ing tool of con­s­tant hard­ness is used, or the hard­ness of the scratch­ing tool is varied while con­s­tant pres­sure is applied.

• Twenty pen­cils (grade 9B to 9H) are used with a stan­dard holder
• Pen­cils are moved with a fixed pres­sure and a fixed angle-ensur­ing the least amount of oper­a­tor error
• Pen­cils can be eas­ily exchanged to min­i­mize down time dur­ing the test

Comes com­plete with:
Pen­cil hard­ness tester PH-5800
Com­plete set of 20 pen­cils from 9B to 9H
Pen­cil shar­p­ener
Abra­sive 400 grit paper
Car­ry­ing case

Pen­cils

The Pen­cil Hard­ness test is an effec­tive method to test coat­ings for their hard­ness and their scratch wear resis­tance. ASTM test method D 3363 allows the use of pen­cils of known hard­ness to be moved over the sur­face of the test sam­ple at a fixed angle and pres­sure to per­form the test.

Comes com­plete with:
Pen­cil Holder Set PH-9500, 9 grades of leads:
B, HB, F, H, 2H, 3H, 4H, 5H, 6H, in packs of 12 each

Note: * When order­ing a replace­ment lead set please spe­c­ify the hard­ness grade.

DPM 100 Dig­i­tal Pocket Micro­s­cope
for dig­i­tal doc­u­men­ta­tion of test results
please see page 222