Convex EdgeSpecialists
Expert sharpening for Japanese-style convex (hamaguri) edge scissors. We preserve your scissors' original geometry.
What is a Convex Edge?
A convex edge (also called hamaguri or clamshell edge) is a curved blade profile used on premium Japanese scissors. Unlike a flat bevel grind, the convex edge has a smooth, rounded taper to the cutting edge.
This profile creates an incredibly sharp, smooth-cutting blade that glides through hair effortlessly. It's the preferred edge on high-end hairdressing scissors from brands like Hikari, Kasho, and Mizutani.
The problem? Most sharpeners don't have the equipment or training to maintain convex edges correctly.
Convex vs Beveled Edge
Why Most Sharpeners Get It Wrong
Standard sharpening equipment is designed for beveled edges. When used on convex scissors, it flattens the curved geometry into a cheap bevel grind.
Wrong Equipment
Flat honing wheels can't maintain a curved edge. They grind away the convex profile.
Lost Performance
Once the convex edge is flattened, the smooth cutting action is gone forever.
Wasted Investment
Premium scissors costing $500-$2000+ reduced to cutting like cheap alternatives.
How We Preserve Convex Edges
We use specialised convex honing equipment that follows the natural curve of the blade. Each scissor is individually assessed and sharpened by hand.
- Dedicated convex honing wheels
- Hand-finishing for perfect edge
- Individual blade assessment
- Original geometry preserved
- 30+ years of experience
Trust Your Convex Scissors to Specialists
Don't let improper sharpening ruin your investment. Send your premium scissors to people who understand convex edges.
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