This instrument offers an easy method for the determination of film hardness for coating applied to a flat substrate. The pencil lead, prepared beforehand by rubbing it on fine abrasive paper（400）,is maintained at an angle of 45º and pushed with uniform pressure onto the sample, either leaving a superficial trace or causing destruction down to the substrate. It complies with the requirements of ASTM D 3363, ISO 15184. 

Main Technical Parameters

■ Three points are touched on the tested surface （roller、pencil lead）
■ The angle between pencil and the tested surface： 45°
■ Pressure of pencil lead ：500g/765g/1000g
■ Packing List：
   ① Pencil Tester, Body 
   ② 1 Set of Pencils （12）：-4B-3B-2B-B-HB-F-H-2H-3H-4H-5H-6H.  
   ③ Special Pencil Sharpener
   ④ Abrasive Paper, 400 grade grit.
   ⑤ Spirit bubble
   ⑥ Rubber
   ⑦ Certificate of conformity or Calibration （if requested）

■ Ordering Information：
   NT 506/1----Pencil Hardness Tester （500g）
  NT 506/3---- Pencil Hardness Tester （1000g）
  NT 506/4----Pencil Hardness Tester （7.5±0.1N/765g）