The fabrics treated with silicone were also considerably easier to iron. To determine the sliding speed of an iron, the WACKER chemists built a sloped surface with a length of just under 90 centimeters and an inclination angle of six to seven degrees in the Burghausen lab. This also showed that, if the fabric softener is formulated with silicone, the iron glides over the fabric more quickly (Figure 2).
WACKER employees in Burghausen were roped in to test the softness of terry towels – washed once with silicone and once without – in a series of comparative studies (Figure 3). The employees were handed the towels, anonymized, so without any markings. “This haptic comparative study showed that fabrics were clearly perceived to be much softer when WACKER® FC 218 was added to the fabric softener,” reports test supervisor Dr. Becker.