Raw Silk is the most natural form of delicate fibre of silk with no twist and is unprocessed form of silk that can be easily woven into different fabrics. Silk containing sericin is called raw silk. The gummy substance, affording protection during processing, is usually retained until the yarn or fabric stage and is removed by boiling the silk in soap and water, leaving it soft and lustrous, with weight reduced by as much as 30 percent. Muga raw silk retains its color for a lifetime. When it is spun, a golden based hue gets generated. Tropical Tussar raw silk is Copper in color. Mulberry raw silk is considered to be the softest and finest texture of all. Temperate Tassar raw silk also bears the similarities with Tropical Tassar silk.