BS 3110 Methods for Measuring Friction Resistance of Prints

BS 3110 Methods for Measuring Friction Resistance of Prints

The aim of the “BS 3110 Methods for measuring the abrasive resistance of prints” standard, developed by the British Standards Institute (BSI), is to provide best industrial practices that help in evaluating the properties of paints. This standard offers methods for measuring the abrasive resistance of prints.

BS 3110 Methods for Measuring Friction Resistance of Prints

This standard is useful for:

  • Ink manufacturers
  • Packaging material industries
  • Printing industries
  • Testing laboratories
  • quality control personnel

The outer surface of packaging carries important information such as usage instructions, consumption and composition, care instructions, and storage information. This data is usually printed on labels and can be damaged by friction during transport. This not only spoils the appearance but can also erase an important message the manufacturer wants to convey to its customers. The BS 3110 standard describes a laboratory method for determining the friction resistance of prints. This standard covers the principle, equipment, and procedure. This can help understand how resistant prints are to friction, so that the appearance of a printed package or container will be damaged when passing through filling and packaging machines or during transport.

One of the main reasons users are concerned with how resistant prints are to friction is to know whether the appearance of the printed packaging or container will be damaged as it passes through filling and packing machines or during transport. In one case, friction usually originates from a metal surface and affects only a small area of ​​the packaging, while in the other, it is usually caused by two similarly printed surfaces rubbing against each other, and larger areas are likely to be affected.

None of the instruments described in this standard fully simulates both conditions; all three do so to some degree, and all three can be used to rub the print against the print or a selected test material. The abrasive used should be that which is normally encountered in practice. It is recommended that tests with all three instruments be performed in a standard atmosphere, i.e., 65 percent plus/minus 2 percent relative humidity and 20 degrees plus/minus 1,7 degrees. The decision regarding an acceptable degree of abrasive resistance is arbitrary and will vary depending on the intended purpose of the printed material. However, the evaluation of the results is more accurate in all cases if at least three tests are performed whenever possible.

In all three methods, it is first necessary to determine the appropriate number of strokes. The results obtained from this can be evaluated by comparing them to the results obtained from an acceptable print. The number of strokes required to create the first perceptible mark is valuable when examined in relation to the full test.

In multi-color printing, visual inspection reveals the relative friction resistance of each color ink. Method 2 is suitable for measurement with a photoelectric cell and subsequent production of a series of standard discs to which further tests can be correlated.

When evaluating test results, the age of the print should be considered. In general, the newer the print, the less stable the ink and the more easily it wears off. To obtain the most accurate and repeatable results, it is desirable to subject the prints to the abrasion resistance test at least one week later and after conditioning them in a standard atmosphere for at least 24 hours.

The methods defined in this standard are as follows:

  • Method 1: Counter-arc tool: This method aims to simulate friction conditions encountered in practice, where one surface rubs back and forth against another.
  • Method 2 Rotary tool: Two sample carrier discs of different diameters are rotated in contact in a horizontal plane with the same angular velocity. The upper, smaller disc is normally positioned so that its circumference passes through the center of the larger disc and is entirely within the circumference of the latter. The motion of the two discs rotating with the same angular velocity is equivalent to the revolution one makes without rotating around the center of the other. Thus, provided that the surface of the larger sample is homogeneous in terms of wear resistance or abrasiveness, the smaller sample is homogeneously contaminated or abraded by the larger sample.
  • Method 3 Manually moving the tool back and forth: The print sample to be tested is rubbed back and forth in a straight line by a second print sample. The second sample is of standard size and under a standard load. The samples are oriented so that the friction occurs at a right angle to the machine direction in both directions.

The BS 3110 standard provides standardized test procedures to evaluate how well printed materials (such as labels, packaging, books, magazines, or any printed surface) resist abrasion, staining, or wear from friction. Friction resistance is a critical quality parameter in the printing, packaging, and graphic arts industries, as poor friction resistance can lead to illegible markings, deterioration of product appearance, customer complaints, or even functional failures (e.g., illegible barcodes or instructions on packaging).

The methods described by this standard for evaluating friction resistance typically include the following:

  • Controlled friction cycles under specified pressure.
  • Measuring ink transfer/damage (visually, by density change or other quantitative methods)
  • Test equipment specifications
  • Preparation of test samples
  • Reproducibility and repeatability conditions

The aim is to provide objective, repeatable ways to compare print durability, which is particularly important for packaging (cardboard, labels, flexible films), commercial printing, and any application where prints are exposed to handling, transport, or consumer contact.

The BS 3110 standard dates back to a time when print quality testing relied heavily on mechanical friction testing equipment. While still occasionally used as a reference, many modern laboratories and specifications have shifted towards newer international standards such as those listed below:

  • ISO 18947-1 Imaging materials and prints - Abrasion resistance - Part 1: General friction test methods
  • ASTM D5264 Standard practice for abrasion resistance of printed materials using Sutherland friction testing machine.
  • ISO 2836 Graphic technology - Prints and printing inks - Evaluation of the resistance of prints to various factors.

Despite being old, the BS 3110 standard remains relevant in quality systems, older specifications, or when historical comparisons are required.

For many years, our organization, with its competent and experienced staff, has been understanding the needs of its clients, providing the advanced testing services they require, and assisting them in the establishment, implementation, and improvement of management systems. Within this framework, we also provide testing services compliant with the BS 3110 standard.

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