Pushen QHQ Pencil Hardness Tester

QHQ

Pencil Hardness Tester

QHQ Desktop Pencil Hardness Tester

The pencil hardness test, also known as the "Wolff-Wilborn" test, uses graphite pencils of different hardness values to evaluate the hardness of the coating.

Sophisticated design ensures that the cylindrical lead remains at a constant 45° angle and maintains a constant pressure.

The minimum hardness value of the pencil that can leave marks on the coating determines the hardness level of the coating.

use

The hardness of the coating film is an important physical property of the coating film, and its size directly affects some important properties of the coating film, such as abrasion resistance, abrasive resistance, abrasion resistance, scratch resistance, impact resistance, and coating Therefore, the hardness of the coating film is a necessary indicator for evaluating the performance of the coating. Applicable to this instrument, it is convenient to measure the hardness of the coating film.

Principle

The instrument is mainly composed of a pencil stand and a test bench. The four-bar linkage mechanism of the pencil stand and the column ensures that the weight of the weight is vertically moved away from the intersection of the pencil lead and the test bench, and keeps the pencil and the test bench at 45°. The included angle does not change. The test bench can move longitudinally, use it to fix the paint sample, and move the sample toward the direction of the scratch, and the pencil will draw the corresponding track on the test piece. Use different pencils to draw different marks, based on which the hardness value of the coating film can be determined.

Standards

GB/T 6739 Paints and varnishes, determination of film hardness by pencil method

(1) Counterweight (2) Stop screw (3) Working rod (4) Weight (5) Pencil holder (6) Screw

(7) Test bench (8) Clamping nut (9) Brake shoe lifting torque (10) Test bench twist (11) Hand wheel

Shipping List

Desktop Pencil Hardness Tester

One balance weight

One 1000g weight

Matching pencils 6B-HB-6H, 13 pcs

user's Guide

Packing list：Pencil hardness tester X1, equilibrating weight X1, 1000g weight X1, Chinese pencil X14, instruction manual X1

[Note]Because the manufacturer's packaging may be updated or upgraded, the detailed packaging list shall be subject to the latest standard configuration of the manufacturer.