Following the most common methods used for Taber Abrasion Test result evaluation:

Cycles to Specific End-Points – The number of necessary cycles to achieve a pre-determined end point, or the condition or appearance of the test specimen after a given number of cycles.

The criteria for evaluation may include, yarn breakage, loss in breaking strength, loss in coating, color loss, change in gloss, or other changes in terms of appearance. When inspecting the changes in the appearance in the test specimen visually, the assessments must be made using a rating system that has been previously agreed upon like a visual grading scale (5 steps, for example) or pass / fail criteria.

Taber Wear Index – This technique indicates the rate of wear. It is computed by measuring the weight loss in milligrams per 1000 abrasion cycles. The lower the number indicated in the wear index gets, the better the resistance to abrasion is.

Mass or Weight Loss – This particular method determines the amount of material that has been eaten away by abrasion. It is typically expressed in milligrams.

Volume Loss – To compare the wear resistance among materials that have varying specific gravities, corrections for each material’s specific gravity must be done to come up with a more accurate measurement of the comparative resistance to wear.

The wear index must be calculated, after which it must be divided by the specific gravity of the material. Using the correction factor gives a wear index that is related to the volume loss in the material to which the assessment is applied. To compare materials with varying specific gravities, you must use the same test parameters including the selection of load and wheel.

Wear Cycles/Mil (0.001 of an inch) – This method is used when expressing abrasion cycles necessary to wear through a coat of a given thickness.

Depth of Wear – When measuring the depth of wear, it is best to utilize a thickness gauge or any other appropriate device to determine the thickness of the specimen on 4 points along the path intended to be abraded, around 38mm measured from the center hole, with the points approximately 900 apart. Compute the average reading.

Once the specimen has undergone abrasion, do the measurements again, then get the average of the readings. Compute for the difference. As an alternative, you can measure the depth of the wear using an instrument like an Optical Micrometer or something similar.

Residual Breaking Force (fabric materials) – This method is used to measure the fabric’s effective strength or the force needed to break a fabric’s specific width. To determine the abraded specimen’s individual breaking force, you can use the procedure provided in the ASTM D5035 and D5034 Standard Testing Method for Breaking Strength & Elongation of Textile Fabrics.

It is worth mentioning that you need to adjust the referenced distance between the clamps to 25 mm, and then horizontally position the abrasion path on the abraded specimen at the midway point between the clamps. The breaking point must be reported to the nearest 0.5 kg.

Average Breaking Strength (fabric materials) – This is measured by getting the average of the abraded specimens’ breaking strength and the unabraded test specimens, as measured using the Residual Breaking Force technique.

Breaking Strength Percentage Loss (fabric materials) – To measure the original fabric’s breaking point and the abraded test specimen, you can use the method cited above (ASTM D5035 and D5034). Compute the breaking strength percentage loss rounded to the nearest 1% for all the widthwise and lengthwise directions.