Determination of paper softness

Paper softness refers to the softness of paper and is usually used to describe the feel and texture of paper. The measurement methods of paper softness include hand feeling method and bending method. The hand feeling method is to evaluate the softness of paper by subjective hand feeling, while the bending method is to measure the softness of paper by bending the paper at a certain angle. Paper softness plays an important role in the selection and application of paper. For example, the softness of paper can affect the writing and printing effects, and it is also related to the processability and durability of paper.

There are two main methods of measuring paper softness:

• Bending test method:

The bend test is a commonly used method for measuring the softness of paper. It is usually measured using a TABER softness meter, which measures the softness index of the paper under pressure, that is, the number of bends, by clamping the paper, applying standardized pressure and bending. The higher the index, the better the softness of the paper.

• Compression test method:

The compression test is a method of evaluating the softness of paper by measuring its compression rate under pressure. It is usually measured with a FREEMAN compressometer or a pressure Tester. This instrument can measure the deformation rate of paper under specific pressure, and is usually used to evaluate the softness and compression resistance of paper.

NBCHAO reminds you: the measurement results of paper softness are affected by many factors, including paper quality, light conditions, measurement methods and instruments, etc. Therefore, care should be taken to control these factors during measurement to ensure the accuracy of measurement results.