Learning how to sharpen good kitchen knives is a fundamental skill for any home cook. Maintaining a sharp edge on quality kitchen knives is a straightforward process that greatly improves safety and cutting performance. A dull knife is more dangerous and makes prep work a chore. This guide will walk you through the best methods to keep your best blades in perfect condition.
You might think sharpening is complex, but it’s really about a few key principles. With the right tools and a little practice, you can achieve professional results at home. Let’s get started on bringing your knives back to life.
How To Sharpen Good Kitchen Knives
Sharpening is the process of removing metal to form a new, sharp edge. Honing is the realignment of that existing edge. For good knives, you need to do both. This section covers the essential tools and concepts you need to understand before you begin.
Essential Tools For Sharpening
Choosing the correct tool is the first step to success. Different tools offer varying levels of control, speed, and learning curve. Your investment should match the quality of your knives.
- Whetstones (Sharpening Stones): The gold standard for control and results. They use water or oil as a lubricant and come in various grits (coarse to fine).
- Manual Pull-Through Sharpeners: These are user-friendly but remove more metal. Best for entry-level or frequently used knives, not heirloom quality.
- Electric Sharpeners: Fast and effective, but aggressive. They are best for everyday knives where speed is a priority over absolute edge longevity.
- Honing Steel: This is not a sharpener. It’s a rod used to straighten the microscopic teeth of the edge between sharpenings. Crucial for maintenance.
- Leather Strop: Used for the final polishing of an edge after sharpening on a stone. It removes the burr and creates a razor finish.
Understanding Knife Angles And Grit
The angle you hold the knife and the grit of your stone determine the final edge. Most Western kitchen knives use a 20-degree angle per side. Japanese knives often use a more acute 15-degree angle. You can find your knife’s specific angle from the manufacturer.
Grit refers to the coarseness of the sharpening surface. A lower number (like 400) is coarse for repairing chips. A medium grit (1000) is perfect for regular sharpening. A high grit (3000+) is for fine polishing. A combination stone (1000/6000) is a great starter option.
How To Find And Hold The Angle
Consistency is key. Place the knife’s spine on the stone, then raise the blade until the bevel (the ground part near the edge) sits flat. That’s your angle. Using your fingers as a guide on the spine can help maintain it. Angle guides are also available to clip onto your blade.
Pre-Sharpening Checklist
Before you start grinding metal, take a moment to prepare. This ensures safety and better results.
- Clean Your Knife: Wash and dry it thoroughly. Grease or food particles can clog your stone.
- Set Up a Stable Workspace: Use a damp towel under your stone to prevent slipping. Ensure you have good lighting.
- Prepare Your Stone: If using a water stone, soak it according to the manufacturer’s instructions (usually 5-15 minutes).
- Protect Your Fingers: Be mindful of your grip. Always push the blade away from your hands and body.
Step-By-Step Guide To Using A Whetstone
This is the most effective method for sharpening good kitchen knives. It requires practice but offers unparalleled results and preserves your knife’s lifespan.
Step 1: Soak And Set Up The Stone
Place your soaking-wet stone on the damp towel. The coarse side (lower grit) should face up if you’re starting there. You want a thin film of water on the stone’s surface throughout the process. This water acts as a lubricant and carries away metal particles.
Step 2: Establish The Sharpening Angle
Place the knife’s heel (the part nearest the handle) at one end of the stone. Rest the spine on the stone and lift the blade to find the correct angle, usually about 20 degrees. Your goal is to keep this angle consistent as you move the knife.
Step 3: The Sharpening Motion
Apply light pressure. Push the knife forward and across the stone as if you are slicing off a thin piece of it. Move from the heel to the tip in one smooth motion. You should feel and hear consistent contact. Repeat this on one side until you can feel a slight burr along the entire opposite edge.
- Tip: Count your strokes to ensure you do the same number on each side. Start with 10-15 strokes per side on a medium grit stone.
Step 4: Form The Burr And Switch Sides
The burr is a tiny, wire-like edge of displaced metal. It tells you that you’ve sharpened enough on that side. Once you feel the burr along the full length, flip the knife over. Repeat the exact same motion on the other side until you form a burr on the first side again.
Step 5: Refine The Edge On A Fine Grit Stone
Flip your stone to the fine-grit side or switch to a higher-grit stone. Repeat the sharpening motion on both sides, using lighter pressure. This step removes the burr and refines the edge, making it smoother and sharper. You’ll do fewer strokes on this stage.
Step 6: Remove The Burr And Strop
To remove the final burr, make very light, alternating edge-leading strokes on the fine stone. Then, if you have a strop, pull the knife backwards (edge trailing) across it a few times per side. This polishes the edge to a mirror finish. Test the sharpness by gently slicing through a piece of paper.
Using A Honing Steel Correctly
Honing should be done regularly, even weekly, to keep your edge aligned. It takes just seconds. A common mistake is using a steel like a sharpener, which can damage the edge.
The Proper Honing Technique
- Hold the steel vertically, tip resting on a cutting board for safety.
- Place the heel of the knife against the top of the steel at the correct angle (usually 15-20 degrees).
- With light pressure, smoothly draw the knife down and across the steel, so the entire edge from heel to tip makes contact.
- Repeat on the other side of the steel. Do 5-6 strokes per side.
If honing doesn’t restore performance, it’s time for a full sharpening on a stone. The steel cannot create a new edge, it only maintains one.
Maintaining Your Knives Between Sharpening
Proper care extends the time between sharpenings and protects your investment. Good habits make all the difference.
Storage And Cleaning Best Practices
Never throw your good knives loose in a drawer. The edges will bang against other utensils and dull quickly. Use a knife block, a magnetic strip, or blade guards. Always hand-wash and dry your knives immediately after use. Dishwashers are terrible for knife edges and handles.
Choosing The Right Cutting Surface
Always cut on soft materials. Wooden or plastic cutting boards are ideal. Avoid glass, marble, ceramic, or stone boards. These hard surfaces will rapidly dull even the sharpest knife. A good board is as important as a good sharpening tool.
Signs Your Knife Needs Sharpening
- It crushes tomatoes instead of slicing them cleanly.
- You need to apply excessive pressure to cut through foods.
- The blade slips off the skin of an onion or pepper.
- It feels “dangerously” dull and requires sawing motions.
Common Sharpening Mistakes To Avoid
Being aware of these pitfalls will save you time and protect your knives from damage.
Applying Too Much Pressure
Let the abrasive surface of the stone do the work. Pressing too hard can gouge the stone, create an uneven edge, and remove too much metal. Use a firm but gentle pressure, especially on finer grits.
Using An Inconsistent Angle
A wobbly angle creates a rounded, dull edge. Focus on locking your wrists and using your whole arm for the motion, not just your hands. Practice with an old knife first to build muscle memory. This is where most beginners struggle, but it gets easier.
Neglecting The Entire Edge
Make sure you sharpen from the very heel to the very tip of the blade. Often, people focus on the middle and neglect the curves at the tip and heel. Each part of the blade must contact the stone during your stroke.
FAQ: Sharpening Good Kitchen Knives
How Often Should I Sharpen My Good Knives?
It depends on use. For a home cook using knives several times a week, a full sharpening every 3-6 months is typical. Use a honing steel weekly to maintain the edge. Professional chefs may need to hone daily and sharpen monthly.
Can I Sharpen Serrated Knives?
Serrated knives require a special tapered rod that matches the grooves. You only sharpen the flat side of the bevel, not the serrated side. For good serrated knives, professional sharpening is often recommended unless you have the proper tool.
What Is The Difference Between Sharpening And Honing?
Sharpening removes material to create a new edge. Honing realigns the existing edge. Think of sharpening as major surgery and honing as routine maintenance. You need to do both for optimal preformance.
Are Electric Sharpeners Bad For Good Knives?
They can be. Many electric sharpeners are aggressive and remove a lot of metal quickly. For high-quality or thin-bladed Japanese knives, they are not ideal. They are better suited for durable, softer steel Western knives where convenience is the top priority.
How Can I Test My Knife’s Sharpness?
The paper test is classic: a sharp knife should slice through a sheet of printer paper cleanly. The tomato test is practical: it should pierce and slice a tomato’s skin with no downward pressure. If it squishes the tomato, it needs sharpening.
Mastering how to sharpen good kitchen knives is a rewarding skill. It makes cooking safer, faster, and more enjoyable. Start with the right tools, practice the techniques, and incorporate regular honing into your routine. Your knives will thank you with years of reliable service, and your food prep will become a pleasure instead of a struggle. Remember, a sharp knife is a safe knife, and a well-maintained tool is a joy to use every single day.