The making of a handcrafted knife follows a series of operations that begins well before the workshop: defining the use, drawing the piece, choosing the steel. Next come the preparation of the blank, heat treatment, grinding, fitting and assembly, guilloché work on the pieces that receive it, shaping of the handle, then finishing, sharpening, and a final inspection. Each step conditions the next. A poorly proportioned drawing pays off at assembly. An irregular sharpening is visible on the first pass over a board.
I am François-Louis Toussaint, a cutlery craftsman in Courpière, in the Thiers basin. I apply this logic to each piece, whether it is unique or produced in a small series.
The main stages of manufacturing
- Define the knife's use and draw its outline.
- Prepare the blade blank and the components.
- Heat treat the steel: hardening, then tempering.
- Shape the bevel and the geometry of the blade.
- Adjust the mechanism, assemble, redo what needs to be done.
- Guilloché the back and the spring, then shape the handle.
- Finish, polish or satin, sharpen, check.
| Step | Work carried out | What it determines |
|---|---|---|
| Design | Usage, shape, dimensions, prototype | The function and overall balance of the knife |
| Preparation of components | Choice of steel, cutting, drilling, touch-ups | The accuracy and repeatability of the parts |
| Heat treatment | Quenching and tempering suited to the steel | Hardness, toughness, edge retention |
| Grinding | Removal of material to form the blade | The behavior of the knife in use |
| Adjustment and assembly | Dry assembly, settings, touch-ups | The actual fine-tuning of the knife |
| Guilloching | Patterns filed on the back, the spring, or the plates | The visual signature of the piece, according to the model |
| Handle shaping | Sizing, contours, rounding, sanding | Comfort and balance in hand |
| Finishing, sharpening, inspection | Satin or polishing, sharpening, checks | A knife ready to serve and to last |
Everything starts with use and design
Before touching the steel, I answer a question: what should this knife do? Slice vegetables every day, accompany a snack in a pocket, stay on a family table. The answer determines everything else. A kitchen knife has neither the shape, nor the thickness, nor the balance of a pocket folding knife.
I then draw the piece: general silhouette, proportions between blade and handle, position of the hand, possible mechanism for a folding knife. The drawing is done digitally or on a template, depending on the project. It is also at this stage that I preselect the steel, depending on the intended use and the heat treatment it will receive.
A first prototype almost always reveals something that the drawing hid. A spring that is too stiff, a guard that hinders the finger, a tip that is too high. I correct it, sometimes several times. This phase of designing and prototyping a knife is the least visible part of the job. Yet it is the one that prevents making a bad knife properly.
Prepare the blade and the components
Once the drawing is finalized, I cut out the blade profile from a sheet of cutlery steel. For this operation, I use laser cutting: I design the files, program the machine, and operate it myself. It gives me consistent profiles that are true to the drawing, including on complex shapes or series of identical parts.
It is necessary to be clear about what a laser produces: a flat shape, nothing more. The part that comes out of the machine is a rough draft. It remains to drill the functional axes, shape the bevel, treat the steel, adjust, assemble, finish. A machine cuts a contour; it has never asked itself if the spring fits correctly.
I am simultaneously preparing the other components: plates, springs, and mechanism parts for a folding knife, handle scales for all models. After cutting, each piece is deburred and finished. To understand why this tool has its place in a workshop like mine, read the role of laser cutting in artisanal cutlery.
Heat treatment gives steel its properties
When it comes out of the cutting process, the steel does not yet have the properties of a blade. Heat treatment gives it these properties. Quenching hardens the steel; tempering, which follows, relieves some of the internal stresses to avoid a blade that is hard but brittle. One cannot go without the other.
There is no universal recipe. Each steel has its protocol: heating, holding, cooling, tempering. The same steel can also be treated differently depending on the intended use. A fine kitchen knife and a pocket folding knife do not require the same compromise between hardness, toughness, and ease of maintenance.
Unique pieces and custom-made productions are handled in the workshop. For certain standard models, this specialized operation can be entrusted to a professional partner, based on the protocol that I set. In all cases, what matters is the rigor of the protocol and its repeatability: an approximate treatment is not visible to the eye, it is paid for in use. I explain the subject in detail on the page dedicated to thermal treatment of a blade.
The grinding builds the geometry of the blade
Grinding consists of gradually removing material to give the blade its cross-section: its thickness at the spine, its slope toward the edge, its thinness behind the cutting edge. It largely determines the behavior of the knife. A thin blade behind the edge passes through a tomato without crushing it; a thicker blade withstands rough work better.
Everything is a matter of compromise between cutting ability and robustness. A kitchen knife, a pocket folding knife, and a table knife do not require the same geometry. Regularity matters as much as the chosen profile: an edge must be symmetrical and consistent along its entire length, otherwise it will distort the cut.
During the work, I check the thickness and regularly cool the blade to avoid damaging the heat treatment. Once again, unique and special pieces are ground in the workshop; for some series models, a preliminary grinding can be entrusted to a specialized partner, with the finishing and inspection being done in the workshop.
Adjust, assemble, disassemble, retake
Fitting is the least spectacular stage of manufacturing. It is also the one that separates an assembled knife from a finished knife. Everything starts with a trial assembly: I put the piece together without fixing it permanently, to check that each component fits correctly.
On a folding knife, the checkpoints follow one another: alignment of the blade in the handle, spring tension, smoothness of opening, absence of lateral play, position of the blade when closed and open. A spring that is too stiff tires the thumb; too soft, it does not hold the blade. Between the two, there are tenths of a millimeter and back-and-forth adjustments between the vise and the file.
A fixed-blade knife requires less mechanics, but just as much precision in the assemblies: contact of the scales on the tang or bolsters, transitions between materials, balance between handle and blade. When something isn't quite right, I take it apart and start over. Sometimes several times. Fitting doesn't make good videos; it makes good knives. I devote a whole page to it: Fitting and assembling a handmade knife.
Engraving the back and the spring
Engraving refers to the patterns filed into the steel, most often on the back of the blade, the spring, and sometimes on the liners of a folding knife. Each line is made with a file, one after the other. The pattern is not stamped: it is carved.
On a folding knife, guilloching adorns the spring and can extend to the lanyard hole, the end of the spring sometimes carved. It sets the rhythm of the knife's line and marks the piece as much as it decorates it: no two cutlers guilloch in the same way. The operation takes place before final assembly, when the back and the spring are still accessible. It requires consistency: a misplaced line is immediately noticeable, and steel does not accept an eraser.
Not all pieces are engraved. The decoration depends on the model and the range; for a unique piece or a custom order, it is defined with the client, in harmony with the rest of the knife.
Shape the handle for the hand and for use
The handle is chosen first for its use. A kitchen knife that is used and washed every day does not require the same material as a pocket folding knife or a piece intended for a display that will nonetheless end up on the table. Wood, stabilized wood, micarta, and other composites: each family has its stability, texture, and way of aging. I detail these families on the page about the materials used for handles.
The shaping follows a progression: plates cut to size and adjusted on the jigs or the tang, roughing out, shaping the volumes, then sanding with increasingly fine grits until the desired surface condition is achieved. Between each pass, the piece is handled again. This is the only check that matters: volume in the palm, smooth transitions between steel and material, no edges that catch.
When the material has grain, I choose its orientation before cutting. A beautiful wood pattern poorly placed is a beautiful pattern wasted. But the grain never replaces a good handling: this requirement applies to all ranges, from cooking knives to unique pieces.
Finishing, polishing, sharpening, checking
The final hours of production are a series of inspections. The surfaces receive their finishing. Satin is achieved with progressive abrasives, in a constant brushing direction: it is a standard finish, which shows less wear than a mirror and can be restored more easily after years of use. Polishing goes further, with fine grits and then polishing compounds, up to a near-mirror state. It requires time and is reserved for the parts that justify it, because every surface defect must have disappeared before it.
The joints, the transitions, and the edges receive the same care: it is often there that the eye, and the thumb, judge a piece. An additional finish is not automatically better. If it improves neither the use nor the actual value of the piece, it has no place. Each series receives a level of finish consistent with its use and its price.
Next comes the sharpening: I prepare the edge according to the geometry of the blade and its intended use. Then a final pass: handling, edge check, mechanism check for a folding knife, complete cleaning, inspection before packaging. No knife leaves without this check. The detail is shown on the page about the finishing touches and the final inspection ; and because a knife lives on after the workshop, the page dedicated to the maintenance of a handcrafted knife explains how to prolong this work.
Unique piece and series model: the same requirements, not the same organization
These two modes of production coexist in my workshop, with the same level of requirement and a different organization.
Unique pieces and off-series production
A unique piece is entirely made in the workshop. I personally carry out all the operations: cutting, drilling, heat treatment, grinding, fitting, possible guilloching, handle shaping, finishing, sharpening. Each decision is adapted to the piece in progress, to its material, to its mechanism. It is a work of variations and adjustments, where the finishing can be taken as far as the project justifies.
Series models
On the series models, the design remains entirely personal: drawing, geometry, choice of materials, and mechanism. The manufacturing, on the other hand, is organized in batches, with templates and regular components. Depending on the model and the organization of the batch, a specialized operation can be entrusted to a professional partner: heat treatment, or a preparatory sharpening. This recourse is not systematic.
Everything else is done in the workshop: fitting, assembly, touch-ups, finishing, sharpening, and final inspection of each knife. This process allows for offering more accessible models without changing the manufacturing logic. I explain the details on the page dedicated to artisan manufacturing, and the guide single piece or small series helps to choose between the two.
What modern tools change, and what they do not change
A drawing software or a laser cutter helps to prepare a shape and ensures repeatability between pieces. That's all, and it is already useful.
The machine does not choose how to use the knife. It does not draw the silhouette, does not decide on the geometry, does not make adjustments, engraving, or corrections, and does not check the handling. A modern tool remains a tool. The responsibility for the result remains human, and it bears a name on each piece that leaves the workshop.
A manufacture designed for knives that are used
The value of a handcrafted knife does not lie in a spectacular gesture or a word on a label. It lies in a chain of coherent decisions: a design thought out for a purpose, a geometry chosen knowingly, a heat treatment adapted to the steel, hours of adjustments that no one sees, corrections accepted when a piece does not fit right.
It also lies in what comes after. A knife designed to be maintained, resharpened, repaired if necessary, monitored over time by the one who made it — from the Courpière workshop, without a middleman. Slicing the morning bread, opening a Saint-Nectaire, cutting a sausage by the side of a path: that’s where a proper sharpening and a well-prepared edge stand out. In the hand, not in the speech.