Pure Silk The thread on which Gutermann was founded. Synonymous with quality and luxury. Suitable for hand and machine sewing. Applications: fine closing seams with fine gloss, fine ornamental stitches and decorative seams. overlock and safety seams, buttonholes and for sewing on buttons. Soft and supple. Tear and abrasion resistant. Elastic and extendible. Light-resistant and colour-fast. Recommended needle and size: Universal, size 80. 100% silk.