The warp (tana) is pre-stretched and is bought with pre-counted threads and in the length required for two sarees. The weft (bana) is brought as single filaments of silk and twirled together four or five times depending on the thickness of silk cloth to be woven before starting the weaving process.
Silk is obtained in kilograms with mulberry silk costing around Rs. 3000 to Rs. 4000 per kilo. Each saree requires about 700 to 800 grams of silk thread for both tana and bana considering loss during weaving.
Silk is tested for quality and authenticity by burning a length of silk. The silk thread after burning should smell like burnt hair and crumple into a ball which breaks easily after touching.