Sharpening stone leveling block, RISAM RW011

RISAM Sharpening Stone Flattener RW011

JIS #180 Ceramic Leveling Block – Flat Whetstones for More Precise Sharpening

The RISAM RW011 sharpening stone flattening block is a ceramic flattening stone with a JIS #180 grit for maintaining wet sharpening stones. It helps remove warped or pitted surfaces from the stone, restore a flat grinding surface, and improve precision when hand-sharpening knives. The grooved ceramic surface effectively removes ground-off material and promotes faster stone dressing.

RISAM RW011: Comparison Block for Regular Maintenance of Sharpening Stones

A sharpening stone gradually wears down during use. Most often, a depression forms in the center of the surface, as this is where users work the blade the most. If the stone remains uneven, the edge is sharpened less precisely, it is harder to maintain the correct angle, and the result may not be uniform along the entire length of the blade.  The RISAM RW011 ceramic leveling block helps restore the whetstone to a flat surface. Rub the grooved side against the wet whetstone until the unevenness is removed. This restores the proper sharpening surface, improves control during sharpening, and extends the life of the whetstone.

Why is a flat whetstone so important?

The flatness of a whetstone is the foundation of precise sharpening. If the stone is warped, the blade won’t glide over it smoothly, and the bevel may be sharpened unevenly. This is especially problematic with kitchen knives that have longer blades, where you need the entire length of the blade to make contact with the same surface of the stone.  Regularly leveling the stone helps achieve a more consistent angle, cleaner contact between the blade and the stone, and better sharpening results. For Japanese water stones, this maintenance is especially important because softer stones wear down faster and lose their flatness more often.

JIS #180 Ceramic Dressing Block

The RISAM RW011 is a ceramic leveling block with a JIS #180 grit. Its coarser grit is designed for leveling the surface of whetstones, not for the final sharpening of knives. Its purpose is to restore the stone’s flatness so that the sharpening itself takes place on a properly prepared surface.  The grooved ceramic surface helps remove grinding slurry and ground-off material. As a result, the block clogs less during use and can more effectively remove raised areas of the stone. The result is a flatter surface that better supports precise knife strokes across the stone.

How to Level a Whetstone</ h2>

The most practical way to check for flatness is to use a simple pencil grid. Draw a dense grid on the surface of the whetstone, soak both the leveling block and the whetstone in water for a few minutes, and then rub the grooved side of the leveling block against the whetstone. Once the pencil lines disappear evenly, the surface is level again.  After leveling, rinse the stones, clean them with a damp cloth or water, and let them air dry. Repeat the process as needed—for frequently used stones, feel free to do this after every one or two sharpening sessions; for less frequently used stones, do so based on visible wear.

What types of stones is this block suitable for?

The RISAM RW011 leveling block is suitable for most water-grinding stones of various sizes and grits. You can use it with basic synthetic stones, finer finishing stones, and stones used for regular maintenance of kitchen knives. It is particularly useful when a stone gradually loses its flatness while sharpening a knife.  The block is not intended for dry sharpening without water. Always use water when working to ensure that the grinding slurry is removed more effectively and that the leveling process proceeds more smoothly. For very hard, diamond, or atypical stones, always follow the manufacturer’s recommendations for the specific stone.

When should you level the stone?

Always level the whetstone when a depression is visible on it, when the knife behaves erratically during sharpening, or when the blade does not make even contact with the stone. During intensive sharpening, it is a good idea to check the stone regularly, because even a small unevenness can affect the quality of the final edge . The manufacturer recommends repeating the leveling as needed, after every one to two sharpening sessions. Softer water stones may require more frequent leveling, while harder stones only need to be checked at longer intervals.

Always Use with Water

Always use the RISAM RW011 dressing block with water. Water helps flush away grinding slurry, reduces surface clogging, and facilitates smooth movement between the dresser and the stone. Dry friction is not recommended, as it can unnecessarily clog the surface, impair control, and increase wear. After finishing your work, rinse the stones and let them air dry. Do not expose them to intense heat, heaters, or direct sunlight unless recommended by the specific stone’s manufacturer. Gradual drying helps protect the stone’s structure and extends its lifespan.

Aligner, sharpening stone, and angle guide: how they work together

The honing block is a tool for maintaining the stone. The whetstone is the actual tool for sharpening the knife. The angle guide, in turn, helps beginners maintain a more stable blade position. Each tool addresses a different issue, but together they can significantly improve the results of manual sharpening.  If you have a flat stone, the right grit, and a consistent angle, the sharpening process is more predictable. The RISAM RW011 leveling block takes care of the first step—ensuring the sharpening surface is flat and ready for precise work.

Maintenance of the Dressing Block

After use, rinse the dressing block with water and remove any grinding slurry. If material remains in the grooves, clean it out with a soft brush. Then let the block air dry. Storing it in a dry place helps keep the ceramic surface clean and ready for the next use.  Do not store the leveling block in a damp environment, and do not leave it submerged in water for long periods. Just like whetstones, it needs to dry after use. When handling the block, be careful not to drop or bump it, as the ceramic material can be susceptible to damage from a strong impact.

RISAM Kitchen: Practical Tools for Sharpening

RISAM Kitchen focuses on practical solutions for knife sharpening and maintenance. The brand’s product line includes manual and electric sharpeners, whetstones, and other tools for both home and professional use. The RW011 leveling block fits into this philosophy as a simple yet essential accessory for anyone who wants to sharpen knives on whetstones with greater precision.  Without a level stone, even good sharpening technique becomes unnecessarily complicated. That’s why the leveling block is one of the accessories that no user of water-powered whetstones should be without.

Technical Specifications

Who is this comparison block ideal for?

For anyone who sharpens knives on water stones and wants to keep the sharpening surface flat. The RISAM RW011 is ideal for home cooks, beginners in knife sharpening, advanced users of Japanese whetstones, and professionals who need consistent results and longer-lasting whetstones.

FAQ – Frequently Asked Questions

1. What is the RISAM RW011 leveling block used for?

It is used for leveling and restoring the flatness of water-whetstones when sharpening knives by hand.

2. What is the block’s grit size?

The dressing block has a grit of JIS #180, which helps remove unevenness from the stone’s surface more quickly.

3. Why is it necessary to dress a whetstone?

An uneven whetstone leads to inaccurate sharpening, poorer blade contact, and a less consistent edge.

4. How can I tell if the stone needs to be leveled?

Draw a grid on the stone with a pencil. If the lines disappear unevenly as you level the stone, it has indentations and needs to be leveled.

5. Does the block have to be used with water?

Yes. Always use the block with water. It is not designed for dry sharpening without water.

6. How often should I level the whetstone?

As needed; generally after every one to two sharpening sessions, or whenever visible unevenness appears.

7. Is it suitable for stones of different grits?

Yes. The block can be used to level whetstones of various grits, especially water stones.

8. How do I clean the leveling block?

After use, rinse it with water, clean it with a soft brush if necessary, and let it air dry.