Bristle Selection
Our bristle comes from the Château de Brossier estate in Calvados, where the Lefebvre family has raised heritage Gascon boar since 1847. Each animal yields only 200 grams of first-cut bristle per year — the outermost layer, where the fibers are densest and most elastic.
After harvest, the bristle is washed in cold spring water and air-dried for three weeks. Then comes the sorting. Marie-Claire Lefebvre, 74, has graded bristle by touch for over fifty years. She separates each bundle into seven grades by stiffness, length, and taper. Only the top two grades — roughly 30% of the harvest — meet TRENFi's specification.
The Handle
Two materials, two traditions. The A-Series handle is turned from solid Tuscan red oak, sourced from the Bosco di Sant'Antimo — a managed forest in the hills south of Siena where trees grow slowly in mineral-rich volcanic soil. The tight grain and deep amber color cannot be replicated in faster-growing timber.
Each handle is turned on a 1960s Italian lathe by a single craftsman who shapes, sands through five progressive grits (80, 120, 220, 400, 600), and finishes with natural beeswax from the same estate's apiaries. The wax seals the grain without coating it — the wood breathes, ages, and darkens naturally over years of use.
The S-Series uses Portuguese cork from century-old oaks in the Herdade da Comporta. Hand-stripped every nine years by tiradores, cork is naturally anti-slip, moisture-resistant, and 40% lighter than hardwood. Each handle develops a unique amber patina.
Pin Engineering
The M-Series uses ground-tip metal pins manufactured at the Klingenfabrik Weber workshop in Solingen — Germany's blade capital since the Middle Ages. Each pin is individually ground to a smooth, rounded 0.3mm tip on diamond-coated wheels.
The distinction matters: ball-tipped pins (used by most brands) are made by welding a plastic bead onto a wire. Ground-tip pins are shaped from a single piece of stainless steel. No weld point means no weak point. No plastic means no degradation from heat styling. The tip glides across the scalp without snagging, even at speed.
The same precision applies to our CNC-milled aluminum electronics housings — tolerances measured in hundredths of a millimeter.
Assembly & Setting
Every component converges in our Milan atelier for final assembly. The bristle is set by hand — each tuft placed with tweezers, angled to follow the curve of the barrel. A skilled setter places approximately 2,400 bristles per brush, working in natural light to judge density and uniformity by eye.
The barrel, the handle, the bristle: three elements that must feel like one. The transition between barrel and handle passes through a short wood neck collar — turned from the same timber as the handle — creating a seamless visual and tactile line from tip to grip.
Quality & Inspection
Before a brush earns the TRENFi mark, it passes through seven inspection points. Balance is tested on a fulcrum — the brush must rest level when placed on a single finger at the neck. Bristle density is measured with a gauge. The handle is checked for grain consistency, finish uniformity, and tactile smoothness.
Then comes the final test: a stylist uses the brush on three different hair types. If the tension isn't right, if the bristle catches, if the handle shifts in a wet grip — the brush is rejected. Our rejection rate averages 8%. Those brushes are disassembled, and the materials are returned to the beginning of the process.