After the Duke 3 prototype fiasco, Simpson worked hard to find a new synthetic fiber supplier (at the time, fibers were primarily produced by BASF and DuPont). Their goal was to release a brush that could rival Mühle’s Silvertip Fibre V2.0 line while offering a true alternative to their own badger hair brushes.
In December 2013, the same testers who had evaluated the Duke 3 received the new Simpson Chubby 2 featuring the updated fibers. The improvement in quality was immediately obvious: soft tips, better flow, and well-balanced backbone.
It was a genuine pleasure to use, though we explicitly advised Simpson and Mark not to set the loft below 54 mm.
We unanimously gave the green light to the new knot. However, Simpson went on to release production models with lofts under 50 mm, resulting in brushes so stiff that customers routinely complained. The issue was never the fiber itself, but the overly short loft height. This was likely due to production issues, as it was the first time they had manufactured synthetic brushes on a larger scale compared to previous releases.
It took Simpson several years to resolve the problem alongside a series of branding shifts—transitioning from "synthetic badger" to "synthetic bristle," and eventually to "Platinum Fibre."
The supplier of those original "Platinum" fibers is no longer operating, but Simpson has since sourced an alternative that closely resembles Mühle’s 4th-generation Silvertip Fibre.
Still, the true history of Simpson synthetic brushes started right here.