{"product_id":"tortoise-polyester-sewing-thread-40s-2-dark-navy-blue-4-cones-3000-yd-each-high-strength-colorfast","title":"tortoise Polyester Sewing Thread 40S\/2 Dark Navy Blue — 4 Cones (2743 m each), High-Strength Colourfast","description":"\u003cp\u003e\u003cstrong\u003eTortoise 4 cones, each with 3000 yards of 100% polyester 40S\/2 thread in dark navy, designed for smooth, high-strength sewing across sergers, overlocks, quilting, and domestic machines.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis set delivers 12,000 yards of durable, colourfast polyester thread on large cones for continuous work without frequent changes. Manufactured with modern twisting and air-splicing methods and silicone oil control, the thread minimizes joins and breakage while maintaining low hairiness and consistent breaking strength. The shade is a deep dark navy blue that resists fading from washing and sunlight.\u003c\/p\u003e\n\n\u003ch3\u003eHow will this thread perform on my serger or high-speed machine?\u003c\/h3\u003e\n\u003cp\u003eThe cones are wound for industrial and home high-speed use, reducing the need to stop and replace spools. Air splicing and controlled silicone application reduce abrupt joins and thread snap, keeping production smooth on fast machines.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eEach cone contains 3000 yards to limit spool changes during long runs.\u003c\/li\u003e\n  \u003cli\u003eAdvanced twisting and air-splice technology lowers the number of weak joints.\u003c\/li\u003e\n  \u003cli\u003eSilicone oil control ensures consistent feed and less tension fluctuation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIs the Tortoise polyester thread strong, and will it fray or fade?\u003c\/h3\u003e\n\u003cp\u003eThis 100% polyester thread is engineered for high tensile strength and low hairiness, making it resistant to fraying and breakage under normal sewing stresses. The colorfastness is rated over level 4 for washing and sunlight, reducing visible fading with routine laundering.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMean breaking strength above 11 N for reliable seams.\u003c\/li\u003e\n  \u003cli\u003eBreaking CV between 5.5–7.5% for consistent performance.\u003c\/li\u003e\n  \u003cli\u003eHairiness ratio under 0.3 at 4 mm to reduce fuzz and lint buildup.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat projects and fabrics are best suited for 40S\/2 dark navy polyester?\u003c\/h3\u003e\n\u003cp\u003e40S\/2 is a versatile medium-fine filament thread ideal for garment construction, topstitching, quilting, and many home-sewing tasks. It works well on woven and knitted fabrics and is compatible with sergers and standard sewing machines for seams and overlocking.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eGarment seams, hems, and topstitching where a neat navy finish is desired.\u003c\/li\u003e\n  \u003cli\u003eQuilting and patchwork where long, continuous runs are helpful.\u003c\/li\u003e\n  \u003cli\u003eOverlock and serging operations on medium to lightweight fabrics.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does buying four cones at once help my workflow and cost?\u003c\/h3\u003e\n\u003cp\u003ePurchasing a four-cone pack supplies 12,000 yards in one purchase, reducing downtime and saving on per-yard cost compared with small spools. It’s convenient for hobbyists and small workshops that need steady supplies for repetitive or bulk sewing.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFewer spool swaps during long sewing sessions.\u003c\/li\u003e\n  \u003cli\u003eLower cost per yard compared with multiple small spools.\u003c\/li\u003e\n  \u003cli\u003eConsistent colour across projects with four identical cones included.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The Tortoise 4-cone dark navy polyester thread set suits home sewers, quilting enthusiasts, small-scale garment makers, and anyone using sergers or high-speed machines who wants long, consistent runs without frequent spool changes. It’s a practical choice when you need a dependable, colourfast medium-weight thread with good tensile properties and low hairiness.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Will this thread fit my domestic sewing machine?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes — the polyester cones work with most domestic and high-speed machines; use a cone stand or thread net if needed.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What colorfastness can I expect after washing?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: The thread’s colorfastness rates over level 4 for washing and sunlight, offering good resistance to fading.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"tortoise","offers":[{"title":"Default Title","offer_id":55252018757969,"sku":"B09J8VYC7T","price":30.39,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1086\/5567\/3681\/files\/tortoise-dark-navy-front-cones.jpg?v=1791646574","url":"https:\/\/craftiche.co.uk\/products\/tortoise-polyester-sewing-thread-40s-2-dark-navy-blue-4-cones-3000-yd-each-high-strength-colorfast","provider":"Craftiche","version":"1.0","type":"link"}