Black Matter is a chemical substance – a cellulose-based material mix made of bioplastics and charcoal powder. In a creative collaboration a chemical mix is applied on a natural fibre garment and left to dry. While the fabric is drying it transforms itself, creating deformed shapes, completing the creative process. In this study, collaboration possibilities and unexpected results are achieved by connecting technological and creative parts to an integral whole of objects and materials. All pieces are completely organic, sustainable and long-lasting. After use, they can be composted, not creating any additional waste, nor do they contaminate nature with solid waste.