HOW GOOD SHARPEN SOUND PUUKKO

TUTO & ADVICE

Many beginners (and even more experienced users) have the same questions:

• « How to find the right angle? »
• « What stone to use? »
• « Will I ruin my beautiful puukko ? »

Here's what you'll learn in this tutorial:

• Scandi grind
• Moisture method
• The particle size
• Errors to avoid
• Test the edge

Don't worry. scandi grind is one of the easiest to sharpen in the world. Once you understand the principle, you won't be able to move on. In this tutorial, I explain everything, step by step. You will find first an ultra-short summary for those who want to go straight to the goal, then a detailed and progressive version, adapted as well for beginners and the passionate who would like to refine their technique. Ready? Let's go.
→ How to recognize the different steels of the blades puukko (carbon, stainless steel, damas)

For the rushes – The summary in 8 points

1. The scandi grind stands flat on the stone: the wide bevel serves as a natural guide.
2. Minimum material: one double-sided flat stone (1000/3000) + one leather with abrasive paste.
3. Mark the bevel with the felt to see where you work.
4. Place the side of the blade flat, tilt until all the bevel is in contact, then sharpen while keeping this position.
5. Same number of passes on each side. Look for the morfil (small blush) and then eliminate it.
6. Then pass on a thinner grain.
7. Finished with leather (strop) by pulling the edge back.
8. Test on a sheet of paper or a coat of arms.

1. Introduction

One puukko It is a question of safety and pleasure.

A blunt knife forces to force. Rinse more easily, fatigue faster, and the risk of injury increases. Conversely, a razor wire penetrates wood, rope or food effortlessly. The work becomes precise, fluid and really pleasant.

Good news: puukko traditional, with its scandi grind, is one of the easiest knives to sharpen in the world. The wide flat bevel literally serves as a guide. Once you understand the principle, you'll never be afraid to touch it again.

The purpose of this page is simple: to allow you to get (and keep) a razor edge, even if you have never sharpened a knife of your life. You will first find an ultra-short summary for the rushes, then all the detailed explanations.

Take your time, breathe, and have fun. It is a real pleasure to revive his blade.

2. Sharpening, sharpening, hooking... just words

These three terms are often used at random. Here is the simple distinction that I use:

• Sharpen (or sharpen in depth): Remove material to recreate the thread. We use an abrasive stone.
• Danger : a more general term which generally includes sharpening.
• Affiliate (or straighten the wire): one does not remove almost no metal, one simply realigns the wire. This is the role of the rifle or, even better for a puukko, leather strop.

In this tutorial, we'll mostly talk Other (stone) and trim (cooking). It is this duo that gives the best results on a scandi grind.

3. Why?scandi grind is so special (and so nice)

Scandi grind is recognizable between a thousand: a large flat bevel that leaves almost from the back of the blade and descends to the wire, without a classic secondary bevel. The wire is therefore formed directly by these two main planes.

Its great advantages:

• The angle is on its own. Just put the bevel flat on the stone.
• It is exceptional for wood carving and bushcraft (excellent penetration).
• It gives an extremely sharp edge.

His little disadvantage:

As the bevel is wide, a little more material is removed at each sharpening than with a secondary bevel knife. It doesn't matter, but you have to know.

Typical angle is usually between 10 and 14° per side (including 20 to 28°), depending on the thickness of the blade. The thinner the blade, the sharper the angle. There is no need to measure the rapporteur: the bevel itself gives you the right angle.

It is precisely this geometry that makes the puukko if attached to sharpen.

4. Equipment required (from minimum to comfortable)

You don't need a factory for good. sharpen one puukko. Here are three levels of material.

Level beginner / budget

1. A double-sided flat stone (1000/3000 or 1200/6000). This is the best value for money to start with.
2. Or, even less expensive: from abrasive paper to water (grains 400, 800, 1200, 2000) glued on a perfectly flat surface (glass plate, tile, straight board).
3. A piece of leather (old belt, leather drop) + some abrasive paste (green or white). Even without dough, clean leather already helps a lot.

Comfort level (recommended)

1. Japanese water stones (King, Shapton, Naniwa...) or diamond plates.
2. A real leather strop stuck on a flat plank.
3. A black indelible marker beginner the most useful).
4. An anti-slip base to stabilize the stone.

Field

• A small double-sided pocket stone (Fallkniven DC4, compact diamond stone, or ceramic).
• Last resort: the unglazed bottom of a ceramic cup works surprisingly well for quick maintenance.

You really only need the level beginner to achieve excellent results. The rest is comfort.

5. Preparation before sharpen

A good preparation does 50% of the work.

1. Inspect the blade
   Look if there's any scratches, very blunt areas or rust. It'll tell you what grain to start with.
2. Clean and dry
   Wipe the blade well. A clean blade slides better and allows you to better see what you're doing.
3. Mark the bevel with the felt
   Colour generously all the bevel scandi with an indelible marker. It's the most effective trick for beginners You will immediately see where the stone works (the marker disappears) and where it does not yet work.
4. Stabilize your stone
   Place it on a damp towel, a slip-resistant mat or a dedicated holder. She must not move.
5. Prepare the water stones
   If you use classic Japanese stones, soak them for 5 to 10 minutes (until the air bubbles disappear). Stones « splash & go » and diamonds only need a light anchorage.

THE TUTORIAL

Step 1 – Finding the right angle

It's the most important part... and the simplest, thanks to the scandi grind.

1. Put your stone firmly in front of you (ideally a little in height to work comfortably).
2. Take your puukko and place the flank (the flat part of the blade) flat on the stone.
3. Gently tilts the blade forward until the whole bevel (the wide area of the grind) in contact with the stone.
4. You must feel a « setting » Net: the bevel is completely flat, without swinging. That's your angle of work.

Tip beginner :
Color all the bevel with a black indelible marker. During sharpening, you will immediately see the areas where you remove matter (the marker disappears). If part of the marker remains intact, you're still not perfectly flat.

On the curve tip of the blade, you will need to raise the handle to keep the bevel in touch. Do it gradually.

Step 2 – Drain (remove from material)

Now that you've found the corner, we're really starting to work.

• First use a medium grain (around 800 to 1200) if your knife still cuts a little bit.
  If the blade is really blunt or chipped, start with a coarser grain (200 to 600).
• Apply pressure moderate and constant. No need to force: let the stone do the work.
• Drag the blade along the entire length of the stone keeping the bevel perfectly flat.
  You can push (slicing forward) or pull (slicing backward). Choose a method and remain consistent.
• Work the entire width of the bevelFrom back to wire.
• Count your passes and do exactly the same number on each side (e.g. 10 or 15 passes on one side, then 10 or 15 on the other).

Tip:
Put one or two fingers of the free hand on the bevel (over the area you work). This helps keep the touch flat and feel if you switch.

Continue until you feel a morfil (a small bit of metal) form on the opposite side. You detect it by gently passing your finger perpendicularly along (never along the wire!).

Step 3 – Progress in grains

Once the morfil is formed over the entire length:

• Go to a thinner grain (2000 to 3000, or 4000–6000 if you have Japanese stones).
• Repeat exactly the same gesture: flat bevel, lighter pressure, same number of passes on each side.
• The morfil will become thinner and more regular.

The more grain you climb, the more polished and durable the edge becomes. For a bushcraft or sculpture use, a 3000 grain followed by a good strop is largely sufficient. For a sharp edge « mirror », you can go further.

Step 4 – Eliminate the morfil

Morfil is the sign that you worked well to the wire... But now we have to make it disappear.

• Continue to alternate sides by gradually reducing pressure.
• Make passes lighter and lighter.
• When you don't feel bad on either side, the morfil is eliminated.

You can also make some very light passes by crossing the movements slightly to further refine the wire.

Step 5 – Leather finish (stropping)

It's the magic step that turns a good edge into a razor edge.

1. Take your leather strop (ideally glued on a flat plank) loaded with an abrasive paste (green, white or diamond).
2. Place the bevel flat on the leather, just like on the stone.
3. Pull the blade back (the sharp must never attack the leather, otherwise you may cut it).
4. Make 20 to 40 light passes on each side, alternating.
5. Reduce the pressure on the last passes.

The strop straightens the last micro-irregularities of the yarn and gives it this polish that drags the blade into the wood or paper as in butter.

Field tip:
Even without paste, a simple leather belt or the back of a leather belt can already significantly improve the edge between two complete sharpenings.

Now you can test your sharpness (paper sheet, arm hair with caution, or a wood shaving). This method is deliberately simple and progressive. Once you have it in your hand, you can adapt it according to your steel, use and preferences (micro-bevel, finer grains, etc.).

Go further with stropping: Techniques sharpening leather for puukkos

Understand grains (granulometry)

The lower the number, the more abrasive the stone (it removes matter quickly).
The higher the number, the finer it is (it polishes and refines the edge).

Classic mistakes to avoid

1. Do not keep the bevel perfectly flat
That's error number one. If you raise the back of the blade a little too much, you create an involuntary micro-bevel or you round the wire. The result: the edge becomes less efficient in sculpture.
→ Solution: press the bevel slightly with the fingers and check regularly with the marker.

2. Too much pressure
Force doesn't accelerate sharpening, it digs unnecessary scratches and it wears the thread.
→ Let the stone work. Moderate pressure is enough.

3. Number of uneven passes on each side
One side works more than the other → the thread moves and the edge becomes asymmetrical.
→ Count your passes. Always the same number on both sides.

4. Forget about completely eliminating the morfil
A remaining morfil gives the impression of a correct edge... until it is removed from the first use.
→ Take the time to make it disappear with very light passes.

5. Sharpen come and go too fast or messy
Sucked movements make the angle lose.
→ Slow, fluid and controlled movements.

6. Neglect leather finish
Many stop after the stone. Too bad: the strop turns a good edge into an exceptional edge.

7. Use a curved or dirty stone
A stone that is no longer flat ruins it scandi grind.
→ Regularly flatten your stones with a diamond plate or a corrector.

Avoid these traps and you will progress very quickly.

There are several simple and reliable ways to check your work.

1. The paper test
Take a piece of paper or magazine. Hold it vertically and try to cut it from top to bottom without sawing.

• A good sharp cut from the first contact.
• An exceptional sharp slice slices the paper like butter, even starting from the middle of the leaf.

2. The arm hair test (with caution)
Gently pass the counter-sense thread on the hairs of your forearm.
If it shaves without forcing, it's excellent.
Be careful: never do this test by pressing hard.

3. Wood shaving test
Take a piece of soft wood (dairy, birch, pine). Try to make a long, fine and continuous shaving.
One puukko well sharpened produces regular and translucent chips without bruising.

4. The tomato or onion test
For those who also use their puukko in outdoor kitchen: a well-ripened tomato must be cut without crushing.

If your knife passes the paper + wood shaving test, you can be proud of yourself.

• Intensive use (sculpture, daily bushcraft): a small pass to strop after each session, and a complete sharpening every 1 to 3 weeks.
• Regular use (hiked, weekend): strop from time to time + complete sharpening every 1-2 months.
• Occasional use: A complete sharpening 2 to 4 times a year is enough, especially if you regularly go to leather.

Golden Rule:
Never wait until the knife doesn't cut at all. It is much faster and nicer maintain a wire still correct than to leave a blade completely blunted. Steel carbon more easily and more often than I stainless steel, but he makes it sharp. Also remember to always dry your blade after use and protect it slightly (oil or grease) if you store it for a long time.