Martial arts like Taekwondo, Karate, Aikido, Jiu-Jutsu and Judo use a uniform that is known as a Gi, which consists of a jacket, pants and a belt. Since there are different coloured belts, a Gi is usually sold with only the jacket and the pants, while the belt has to be purchased separately. Training in martial arts is rigorous and thus, the Gi gets soiled with dirt, dust, odour, and sweat. Therefore, the Gi must be washed and following washing instructions enables the Gi to last a long time. Washing usually consists of three phases, which are pre-washing, washing and post-washing. [...]