PHT Pencil Hardness Tester
your supplier of instruments for quality control
Maintenance and Calibration Services
NEURTEK S.A. RESERVES THE RIGHT TO CHANGE WITHOUT PRIOR NOTICE.
1 Description of the product
Equipment developed to test the scratch hardness of paints, inks, coatings and varnishes, also known as
the Wolff-Wilborn test. The equipment complies with ISO 15184 and ASTM D3363 regulations, among
others.
The device consists of a pencil holder supported by two rollers, the weight of which is adjusted to
ensure the force of the pencil acting on the tested surface is 7.5 Newtons.
It can also be supplied with a fitting that allows testing to 10 Newtons.
2 General information
Scratch test following the Wolff-Wilborn method, the pencils pass over the surface under pressure and
at a fixed angle to ensure minimum user error. The test is conducted using a fixed pressure of 7.5 N
and at an angle of 45 degrees.
The test is well regarded and used in sectors such as furniture and automotive paint and is also useful
for developing synthetic resins or other coatings.
The pencil holder ensures the test is consistent. The pencils can be changed easily to minimise
interruptions during the test.
3 Equipment components
The equipment is supplied with:
Carrying case including:
•Test pencil holder
•Set of 14 pencils: from 6B to 6H
•Pencil sharpener
Optional accessories:
•Set of 14 pencils (replacement)
•Set of three pencils with special hardness: 7H, 8H, and 9H
•Attachment for 10 N test
