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Developing Semperfli Classic Waxed (CWT) Threads Semperfli Classic Waxed Threads (CWT) took over 2 years development from initial concept to final manufacturing. Fly tyers used Nano Silk world wide and it is regarded as one of the best high strength threads made from GSP (Gel Spun Polyethylene) on the market. However many of our Pro Team and Ambassadors requested a standard polyester thread for their daily fly tying requirements. As a team we examined the competitive polyester threads on the market. Some threads were tightly bonded and consequently very difficult to split and difficult to lay flat. Some threads were too heavily waxed and jammed up bobbins and some too lightly waxed or unwaxed and of course wax can help stop materials moving as we are tying our flies. We then checked thread sizes and found the market confusing, we measured the diameters and breaking strains of threads and found that some manufacturers had threads in many different aught ( / 0) sizes which actually had the same diameter and breaking strain. It led the team to question actually was this the same thread just advertised differently to get shops and fly tyers to buy more thread thinking they were getting something different. Next we looked at the commercial issues of threads, some suppliers put 50m, some 100m and some 200m of thread on a spool.

CWT Thread Target Specifications Paul Procter

The R&D team defined that the thread must: 

lay flatter than most polyester threads on the market



be better quality and easy to split



available in a large range of natural and attractor colors



better value to fly tyers and shops having more thread on a spool



have high strength

The R&D team at Semperfli took all of its knowledge from Nano Silk and applied this to the development of CWT. Nano Silk and CWT are extruded like spaghetti. The trick comes to how these thin strands are bound together to form the final thread. We bound the thread into 2 strands which are lightly bonded (glued together) and those strands lightly twisted. We used about 30% less twist than some of the manufacturers as this made a thread that laid flatter on the hook and would also split easily. Next we worked with two of our incredible Ambassadors on the wax content to get this right. Hans van Klinken Paul Procter came up with a very neat test. We had to apply the wax so that our thread would hold with the same or one less turn of thread on the hook. With a flat thread and wax we worked to minimise the wax and maximise the thread grip. After 20 months we had finished our prototypes and developed our threads. We sent the Pro Team samples of the CWT at our Annual Fly Jam conference where worldwide our team review potential future products. It is fair to say that the CWT samples caused a stir, everyone was amazed and delighted with the prototype products. However we still had a concern within the Semperfli management team. If the thread was taken up as much as we anticipated it could impact our manufacturing capabilities so over a period of 4 months in summer 2018 we increased our manufacturing capabilities by 3x. As a professional business we have a business plan and have targets for each product. Our concerns over take up were right. Within the first 3 months we sold the first years anticipated sales volumes of CWT and it continued to explode worldwide. Indeed now our favorite game is working with fly tyers at shows and exhibitions worldwide and getting them tying with CWT. The results have been fantastic with many of the worlds top fly tyers using CWT. We have seen top tyers who have used threads from one manufacturer for 30 years throw away their entire stock to move to CWT. The biggest joy was watching the Norwegian Speed Fly tying championships. Here they must tie 6 supa pupa flies. The 2 top tyers were using CWT and another high volume polyester thread from another manufacturer. The person using CWT won as the thread from the other manufacturer broke. The 8/0 from Semperfli is 40% stronger than that manufacturers 8/0 thread! All the hard work in developing a new thread had been worth it. Version Spring 2020

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Profile for Semperfli

Semperfli Fly Tying Guide Spring 2020  

Semperfli Fly Tying Guide Spring 2020, the best in fly tying materials from one of the most innovative companies in the fly tying industry....

Semperfli Fly Tying Guide Spring 2020  

Semperfli Fly Tying Guide Spring 2020, the best in fly tying materials from one of the most innovative companies in the fly tying industry....

Profile for semperfli