Are Marathon threads colourfast?
Polyester threads are extremely colourfast no matter what detergents you use (refer to Q3). As for Viscose Rayon Threads, as long as garments are washed using a mild detergent containing no additives, Marathon threads will remain colourfast for the life of the garment. Many people prefer to use Viscose Rayons as rayon threads come in a rich variety of colours (397 colours) and especially because of their velvet-like silky lustre. Please refer to the washing instruction listed in the colour chart.
