Factors Affecting The Printing Quality Of The Labels

Scuff Resistance Tester is equipment to evaluate the Print Quality / Rub proofs of prints on a substrate. Excellent Print Quality is a perfect combination of:

Good Ink + Good Paper + Good Process + Good Drying

If any of the above factors go wrong, the result can be disastrous. The most commonly used method to evaluate print quality is by rubbing two printed planes against each other. However, if this is done physically, the amount of force applied during chafing cannot be quantified and kept constant. Furthermore, it is difficult to maintain the plane of constant contact and maintain a track of the number of rubs. Hence, this technique is considered as more operator dependent.

Purpose of Scuff Resistance Tester

Scuff Resistance Tester is the technique that runs the facade of two printed labels with each other by placing the printed surface face to face and on the same plane. The movement of the jaws is done with the speed of 60 rotations per minute under a continuous rubbing pressure. The scuffing instrument is widely used by the manufacturers in paper and packaging industries to measure the color fastness of printed and coated surfaces at the time of rubbing and chafing.

As per the standard operating procedure, the sample is placed on the machine with the printed sides up. A weight of 2 psi is placed on the device which is attached to the sample. After this, the testing device is pre-setted to the number of strokes, and the test is initiated. After this required number of strokes, the samples are examined for any kind of ink transfer or scuffing.

What makes Presto Scuff Resistance Tester different from others?

• Model Type – Bench Type Model
• Test Weight – 2 Psi (As per the test requirement)
• Rubbing – Anti-directional @60rpm
• Counter – 4 Digit Preset Counter
• Counter Range – 0-9999 counts
• Diameter of Upper Clamp – 50mm ± 2mm
• Diameter of Lower Clamp – 124mm ± 2mm
• Upper Motor Capacity – 10kg/cm² Torque / 220V Single Phase AC
• Lower Motor Capacity – ¼ HP / 220V Single Phase AC
• Input Voltage – 5 Ampere 220 V AC, Single Phase, 50 Hz + Earth
• Power Consumption – 2.5 KW

Standard Operating Procedure of Scuff Resistance Tester

• First of all, turn ON the machine by plugging the mains socket of the machine into a 3 pin 15 amp socket.
• Switch on the “Main ON” button.
• After clamping both the samples firmly on the device, pull down the level pin so that both the Samples of upper and lower clamp touch each other.

• Now Set the number of cycles from the Preset Cycle Timer i.e. between 0 – 9999 counts (As per test requirement typically 100 cycles)
• Now put the weight of 2psi on the machine which is provided with the device.
• Now push the start button to begin the test. This process helps to measure the quality of the print on the packaging labels.