How we burnish an edge in four passes, by hand

• By Sora Ikia

Pick up a bag and run your thumb along the outer rim of the strap. If it feels dry, or slightly furred, or if there is a hairline seam where two layers meet, that bag will start coming apart at the edge long before the leather itself gives out.

Everything else on a bag is protected. The panels have grain on one side and lining on the other. The edge has nothing. It is raw cut fibre, exposed to sweat, rain, coat sleeves and the inside of car doors. Seal it properly and it outlasts the hardware. Seal it badly and it fuzzes within a season.

We do it in four passes. It takes about forty minutes per bag and it is the slowest step on the bench.

Pass one, sanding

The cut edge comes off the clicking press square and rough, with the layers slightly out of register. Our finisher sands it down through three grits, working from 180 up to 600, until the layers read as one solid piece rather than a stack. This is where most of the shape is decided. A rounded edge and a squared edge feel completely different in the hand, and once the sanding is done that choice is locked.

Pass two, the first coat

Water based edge paint goes on with a fine roller, thin enough that it soaks in rather than sits on top. It looks wrong at this stage. Patchy, matte, slightly grey. That is correct. The first coat is not there to be seen. It is there to bind the fibre so the coats above it have something to hold.

It dries for two hours. There is no way to shorten this.

Pass three, the second coat and the iron

A second coat goes on, and while it is still soft the finisher runs a heated creaser along the edge. The heat drives the paint down into the fibre and compresses the whole edge into a smooth, slightly convex line. This is the pass you can hear. The iron makes a low hiss as it moves.

Get the temperature wrong by twenty degrees and the paint scorches. Move too slowly and it pools. Every finisher on our bench spends their first three months doing nothing but this.

Pass four, burnishing

The last pass uses no paint at all. A hardwood slicker, warmed by friction, is drawn along the edge again and again until the surface polishes to a low sheen. Nothing is added. The gloss comes entirely from compressing the fibre against itself.

Then the edge is checked under a raking light, which shows up any ripple the eye misses when looking straight on. If there is one, the whole edge goes back to pass one.

Why bother

You could skip to a single thick coat of paint and be done in five minutes. It looks identical on the shelf. The difference shows up in year three, when the thick coat has cracked and peeled away in flakes and the hand burnished edge has simply darkened slightly, the way leather does.

We are not making bags to look right in a photograph. We are making them to still be worth repairing in a decade, and an edge done properly is what makes the repair worth doing at all.

Every Strade bag is finished by hand at our workshop. If the edge on yours ever wears through, send it back. Refinishing is part of our repair service.