"abraded" - 1 õppematerjal

Vormistamine ülesanne 2

 FIGURE 2. Martindale pilling tester. In Pilling Box (see Figure 3) samples are mounted on polyurethane tubes and are tumbled in cork- lined rotating wooden boxes. Accordingly, the samples move under the condition of no pressure and the specimens are conducted under mutual transient touching. As a consequence, unlike the Martindale method, the rubbing for the samples is random. Whichever is the device (Martindale or Pilling Box), the final result consists of abraded fabrics to be assessed in terms of pilling. This is performed by skilled operators (experts) comparing the specimens, after a predefined number of cycles performed by the testing equipment, with visual standards (which may be actual fabrics samples or photographs). On the basis this comparison, the experts define the resistance to pilling using the so called “degree of pilling” [1] i.e. an index