Traditionally, the hand feel of a tissue product has been tested by the human hand, in the best case by human hand panels. The human feeling depends on several factors, e.g. personal and market specific preferences, the daily mood and the culture. A further disadvantage is the inability to feel the three basic haptic parameters, which determine the overall haptic impression of a material that is touched by the hand.
The emtec TSA Tissue Softness Analyzer objectively measures the micro-surface variations (feeling of softness), the macro-surface variations (feeling of roughness) and the in-plane stiffness of any kind of tissue paper (base material and finished products).
Softness, roughness and stiffness are the three basic haptic parameters, which also the human hand feels. But, in comparison to the human hand, the device provides these three parameters as individual values. By the help of special algorithms, these three single parameters can be combined to so-called hand feel (HF) values. With the right mathematical model, a correlation to the human expectation of up to almost 100 percent is possible.