Postal Services are still experiencing some delays from holiday back log & COVID-19 related staffing challenges. In addition, we have temporarily ceased all UK orders for tangible goods due to the new BREXIT-related VAT requirements. Thank you for your patience!
All manner of threads show up in advertisements of the 18th and 19th century, including silk. Looking at extant garments you will find various weights of silk typically used for silk and wool. It was available in a variety of colors to suit any need.