Rub testing is performed on printed materials to determine the amount of abrasion they face during transportation, storage, and handling. One of the areas that require abrasion testing is the pharmaceutical field. Medical equipment and products contain labels indicating important dosage information. When these labels are scrapped off, it can be hard to retrieve the manufacturer’s specifications on how to store or use the equipment or product. To avoid this problem, manufacturers perform abrasion testing on their product labels and prints before shipping.
The Sutherland Rub Tester is one of the standard equipment used to establish how much abrasion or damage may occur to printed equipment or products during shipping, storage, and handling. Danilee Co., LLC, the manufacturer of Sutherland Rub Tester, has been in the abrasion testing business for the past six decades. It is renowned for producing certified rub testing products for manufacturers in different industries.
How the Ink Rub Tester Equipment Works
The ink rub tester works by simulating the effects of physical contact on printed materials. It also predicts the possible types of abrasion that a label can go through during normal handling. During testing, a tag is attached to the tester, and another similar test sample is appended to a weighted test strip. These two labels are then rubbed against each other over an arc at a constant speed and predetermined cycle.
At the end of the rubbing test, the labels are inspected to determine if the ink in either of them has been erased partially or entirely. This kind of simulation determines the durability of the ink label, especially when exposed to conventional handling and transportation conditions.
The Sutherland 2000 Rub Tester
This is one of the most efficient equipment for testing abrasion resistance. It works through simulation as described above. The Sutherland 2000 rub tester has unique features that can make abrasion testing more efficient.
Characterized by four speeds, the Sutherland 2000’s test motor works on different labels and surfaces. The first motor speed (21 cycles per minute) is used for testing wet labels. The second motor speed is 42 cycles per minute. Sutherland 2000’s third motor speed measures 85 cycles per minute just like in other normal testers. Its fourth motor speed (106 cycles per minute) is mostly used to test abrasion on hard labels.
The Sutherland 2000 Dual Tester
This equipment is the most recent version of the Sutherland 2000 Rub Tester. It has the ability to test two specimens simultaneously. When large scale testing is to be performed, this equipment delivers in a timely manner.
Sutherland 2000 Dual Tester brings with it two 2-pound weights and two 4-pound weights to provide you with a variety of testing options. You can also simulate how different abrasive environments affect the same label at the same time.
Rub testing has also been used to test labels of fabric and characters on keyboards and keypads among others. It is, therefore, an important technology to consider in determining the strength of your product labels.