Specifications:

• To and fro rubbing tester designed to determine the behavior of the surface of leather on rubbing with a wool felt. Designed for determining the degree of colour transferred from the surface of coloured materials to other surfaces by rubbing.
• Tester consists of a base on to which the sample to be tested is secured.
• A sliding mechanism to traverse a finger along the sample.
• The end of the finger covered by a piece of cloth and a pre-determined load applied to the finger during the sliding motion. Coloured leathers tested using a white bleached cloth for white leathers, a black colour-fast cloth use. Assessment of colour transfer using the grey scale for assessing change in colour. White cloth, GSTD422CL/500, for rubbing and the grey scales should be provided with the equipment.
• The rub fastness test machine should incorporate a carriage with a horizontal completely planar metal platform.
• A holder for fastening the leather to the platform, leaving approximately 80mm exposed; A device with which the leather may be extended at least 20% linearly in the direction of rubbing. It should have four fingers each, 500g±25g in mass, removable, yet able to be fixed firmly in place and able to freely move vertically, with: a base measuring (15 x15) mm, a device for attaching pieces of wool felt to the base; the depth of the cavity shall be 3.9mm±0.1mm, a weight –piece of mass 500g±10g to load the finger up to a total mass of 1000g±35g; A means of lowering the finger with the base flat onto the test specimen. It has a means for driving the carriage to and fro with a distance of travel of 35 mm to 40 mm at a frequency of 40 cycles/min±2cycles/min for the complete forward and backward motion. It has a means of adjusting the position of the finger at right angles to the direction of rubbing, so that two or three positions may be used for rubbing on one piece of leather; a motor to drive the carriage forward and backward; and a means for pre-selecting a given number of cycles. Dimension (L x W) mm: (100 x 600) mm, Weight : 10kgs.

Accessories:

Grayscale: 2pcs of gray scale for assessing change in color in accordance with standards, 2pcs of grayscale for assessing staining in accordance with standards, 1 pcs of Light Cabinet, using illumination according to standard, 2 pcs of cutting die for determination of colour fastness to cycles of to and fro rubbing test as per standard inner wall of which is a rectangular (L x W) mm; (100 x20) mm. Consumables: 20 packs of Rubbing material: Square pieces of white wool felt: measuring approximately (15 x 15)mm punched out of a sheet of pure wool felt meeting the following specifications: PH of water extract between 4.5 and 8.0 according to standard, Mass per unit area: 1 900g/m2 ± 150 g/m2, Thickness determined in accordance with standard method A:6.0mm ± 0.5mm.