""K.V.S. CROCKMETER (Motorised or Hand Operated)
""(FOR DRY/WET RUBBING FASTNESS)
  
 

INTRODUCTION
The Test is intended for determining the resistance of the colour of Textiles and Leather of all kinds to Rubbing off either Dry or Wet condition and Staining other materials.

EQUIPMENT
The K.V.S. Crockmeter consists of the Main unit having a Brass Rubbing Finger of Cylindrical shape. The Finger has an Ø of 16 mm. During the Crocking Test, the Finger is covered with CROCKING CLOTH (Standard Fabric) with the help of the Ring/Garment Clamp. It is than rubbed against the Test Specimen under a fixed load of 9 Newton's. The Finger is moved over the test specimen for 10 times and the colour transferred on to the Crocking Cloth is evaluated with the help of the Standard Grey Scales.

The K.V.S. Crockmeter is nicely finished in White paint. Other parts are chrome plated to give a Corrosion-Resistant fine finish.
Technical Specifications :
 
Diameter of the Rubbing Finger
:
 16 mm
 Length of the Traverse of the Finger
:
 100 mm
 Effective Load on the Finger
:
 9 Newtons
Size of Test Specimen
:
 25 cm x 5 cm
Size of Crocking Cloth (Standard Fabric)
:
 5 cm x 5 cm
Overall Dimensions of the Unit
:
 23” x 10” x 10
Net Weight of the Unit
:
 10.5 kg
Counter : 4 Digits Counter

The equipment is supplied complete with :
1. Main Unit with Built-in Counter.
2. One Ring/Garment Clamp (For fixing the Crocking Cloth on the Rubbing Finger).
3. 200 Crocking Cloths (Standard Fabric).

 
RELATED STANDARDS
IS 766-1988  : Method of determination of Colour Fastness of
    Textile Materials to Rubbing.
ASTM D 689  : Colour Fastness to Crocking (Rubbing).
ASTM D 1424  : Textiles-Test for Colour Fastness Part X 12;
    Colour Fastness to Rubbing.
IS 6191 : Methods of Micro-Biological Colour Fastness
    and Microscopically Test for Leather.