TACONY CORPORATION-Madeira Ray Thread: Size 40. Madeira rayon thread is constructed of top quality high tensile strength 100% Viscose. It can be used to embroider onto any fabric including denim, leather and PVC. Very wide color selection. Ombre (gentle tone on tone colors progress smoothly from light to dark to give a shaded look), Multicolor (a range of color combinations create stunning and dynamic striped effects), Potpourri (flecks of color shine through the thread to give larger step-stitch designs a colorful sprinkled effect), Melange (two contrary solid colored strands twisted together create exciting shading effects within the same design and add natural appearance for instance to the skin of an animal). Color fast to 203F/95C. Size 40 218 yard/200 meter spool. Imported.