12000 sharpening stone, Kuromaku SHAPTON K0705 yellow
Code: SHA-K0705Product detailed description
Japanese SHAPTON Kuromaku JIS #12000 sharpening stone
An ultra-fine polishing water stone for professional finishing of an already sharpened edge, smoothing the bevel and precisely removing the remaining burr.
SHAPTON Kuromaku JIS #12000 is an extremely fine Japanese polishing stone intended for the final stage of professional sharpening. It is used on an edge that has already been correctly formed and progressively refined on lower-grit stones.
The #12000 grit smooths the extremely fine marks left by the previous polishing stone, helps remove the remaining burr and creates an exceptionally smooth cutting edge. It offers the greatest benefit for high-quality Japanese knives, slicing blades, straight razors and precision cutting tools.
The hard structure of the stone provides precise feedback while guiding the blade and wears slowly. The practical plastic case makes safe storage easier and can also be used as a basic stand during polishing.
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What can #12000 grit achieve?
Ultra-fine bevel finishing
The stone removes extremely fine marks left by the previous grit and smooths the surface of an already sharpened edge.
Precise cutting edge
Correct use helps create a clean and smooth edge suitable for exceptionally precise slicing and fine work.
Gentle work on quality steel
The extremely fine grit removes only a small amount of material and is suitable for final work on hard Japanese and European knife steels.
Hard stone with low water absorption
The stone does not require prolonged soaking. Before use, simply wet its working surface with clean water.
#12000 is the final step, not the beginning of sharpening
The #12000 stone cannot efficiently restore a dull or damaged edge. Before it is used, the knife must already be perfectly sharp and refined on lower grits. The ideal previous step is a #8000 stone.
What applications is the stone suitable for?
- final polishing of high-quality Japanese kitchen knives,
- Yanagiba, Sujihiki, Sakimaru and other slicing blades,
- precise finishing of Gyuto, Santoku, Nakiri and Kiritsuke knives,
- hard carbon, stainless and powder-metallurgy knife steels,
- final refinement of the edge after a #8000 stone,
- finishing suitable straight razors,
- fine carving and woodworking tools,
- experienced sharpeners and users who require an exceptionally fine edge.
Technical specifications
| Brand | SHAPTON |
|---|---|
| Product line | Kuromaku |
| Grit | JIS #12000 |
| Use | Ultra-fine polishing and final edge finishing |
| Abrasive | Silicon carbide (SiC) |
| Dimensions | 210 × 70 × 15 mm |
| Weight | 200 g |
| Colour | Yellow |
| Product code | SHA-K0705 |
| EAN | 4944509307054 |
| Country of manufacture | Japan |
Recommended progression to a #12000 edge
| Grit | Task | Result |
|---|---|---|
| #1000 | Creating the edge | A continuous sharp cutting edge and basic working bevel. |
| #3000 to #5000 | Refining the bevel | Removal of coarser marks and preparation for fine polishing. |
| #8000 | Very fine polishing | A fine bevel prepared for the final step. |
| #12000 | Final finishing | An ultra-fine, smooth and precisely finished cutting edge. |
The ideal previous step is SHAPTON Kuromaku #8000. Moving directly from a significantly coarser stone to #12000 would be slow and might not remove all deeper sharpening marks.
Does a kitchen knife need #12000 grit?
Not for most ordinary home cooking. Universal kitchen knives can be finished very effectively on #3000 to #5000. The #12000 stone is primarily intended for specialised slicing blades, straight razors and users who require the finest possible finish.
When can a lower grit be more practical?
An ultra-fine edge excels at smooth slicing and precise cutting. For some ordinary kitchen tasks, however, finishing on a lower grit may be more suitable because it preserves a more pronounced microscopic structure on the cutting edge.
A universal knife for tomatoes, firm-skinned vegetables or everyday work may therefore gain little from finishing on #12000. By contrast, a Yanagiba, Sujihiki or straight razor can make better use of an extremely fine and smooth edge.
The appearance of the bevel is not the only measure of sharpness
Even at high grits, SHAPTON stones may leave a fine matt or semi-gloss finish. Correct geometry, an evenly finished bevel and complete burr removal are more important than a perfect mirror appearance.
How to use SHAPTON Kuromaku #12000
- First finish the edge on a #8000 stone. The edge must already be extremely fine and free from damage.
- Briefly wet the working surface. Prolonged soaking is not suitable.
- Secure the stone firmly. The case can be used as a stand, but it must remain stable.
- Maintain the exact edge angle created during the previous sharpening stage.
- Use minimal pressure. Excessive pressure can create a new burr or round the cutting edge.
- Use slow and controlled strokes.
- Alternate the sides of the blade regularly.
- Perform the final strokes almost entirely with the weight of the knife.
- Rinse the knife, dry it immediately and inspect the edge.
Precision polishing requires mastered fundamentals
During our knife-sharpening course you will learn how to create the edge correctly, maintain a consistent angle, progress through the individual grits and safely remove the burr.
Care of the ultra-fine polishing stone
- Before use, only wet the stone briefly with clean water.
- Do not leave it submerged for extended periods.
- Keep the working surface wet during polishing.
- After use, gently rinse the stone without detergent.
- Allow it to dry slowly at room temperature.
- Do not place it on a heater or in direct sunlight.
- Place only a completely dry stone in the plastic case.
- When flattening the fine surface, work carefully and preserve its flatness.
Suitable holders, cleaning accessories and flattening tools can be found in the sharpening accessories category. Other grits can be found in the SHAPTON Kuromaku range.
Who is the stone suitable for?
SHAPTON Kuromaku #12000 is suitable for experienced sharpeners, professional chefs, barbers and owners of very high-quality Japanese knives. It offers the greatest benefit when finishing slicing blades, straight razors and precision cutting tools.
Who is it not suitable for?
The stone is not suitable as the first or only sharpening stone. It will not repair a dull, serrated or chipped edge and is not intended for ceramic knives. A basic #1000 stone is more suitable for beginners.
Unsure whether #12000 is suitable for your knife?
Call us at +420 702 049 048, Monday to Friday between 7:30 and 16:00. We will recommend a suitable final grit according to the knife construction, steel used and cutting style.
Frequently asked questions
What is the #12000 sharpening stone intended for?
It is used for ultra-fine polishing of an already sharpened edge, smoothing the bevel and precisely removing the remaining burr.
Can a dull knife be sharpened on the #12000 stone?
Not efficiently. A dull edge must first be created on a basic stone and then progressively refined.
Which stone should be used before #12000 grit?
The ideal previous step is a fine polishing stone of approximately #8000 grit.
Does every kitchen knife need to be finished on #12000?
No. For most kitchen knives, #3000 to #5000 is sufficient. The #12000 grit is intended for specialised and exceptionally fine edges.
Is the #12000 stone suitable for straight razors?
Yes. It can be used for fine finishing of suitable straight razors, provided that the bevel has been correctly prepared on lower grits.
Will SHAPTON Kuromaku #12000 create a mirror polish?
The stone significantly refines the surface, but the result may not be a perfectly mirrored finish. Functional sharpness depends mainly on the geometry and cleanliness of the edge.
Does the #12000 stone need to be soaked?
No. It only needs to be briefly wetted before use. Prolonged soaking of fine SHAPTON stones is not recommended.
Is the stone suitable for hard Japanese steels?
Yes. It is suitable for final finishing of hard Japanese steels, provided that the edge has been correctly prepared on the preceding stones.
Can the plastic case be used as a holder?
Yes. The case can serve as a basic stand, but it must be securely stabilised before sharpening.
Is the stone suitable for ceramic knives?
No. Ceramic knives require sharpening equipment intended specifically for ceramic blades.
Additional parameters
| Category: | Shapton Kuromaku – Sharpening Stones |
|---|---|
| Warranty: | 2 years |
| Weight: | 0.2 kg |
| EAN: | 4944509307054 |
| production: | Japan |
SHAPTON – Japanese specialist in sharpening stones
SHAPTON Co., Ltd. is a Japanese manufacturer of synthetic sharpening stones and accessories for precise edge maintenance. The brand is known for fast abrasive action, a stable structure and a wide choice of grits for kitchen knives and craft tools.
SHAPTON is based in the town of Mashiko in Japan’s Tochigi Prefecture. The company focuses on developing sharpening stones that allow fast, controlled and highly repeatable edge work. Its products are used by professional sharpeners, chefs, craftspeople and home users who want to maintain their knives by hand.
SHAPTON sharpening stones feature a high concentration of abrasive particles and a carefully designed bonding system. This allows them to remove material efficiently, provide clear feedback during sharpening and wear more slowly than many softer stones. The wide grit range makes it possible to repair a damaged edge, create a new bevel, restore ordinary working sharpness and carry out extremely fine final polishing.
You can find the complete selection in the SHAPTON sharpening stones category.
Why are SHAPTON stones so popular?
Fast abrasive action
The high abrasive content makes it possible to restore the bevel effectively even on harder modern steels. With correct technique, there is therefore no need to apply heavy pressure to the blade.
No long soaking required
SHAPTON stones are designed for quick preparation. Before sharpening, the surface is usually only moistened with water, allowing you to start working without a long wait.
Lower wear
The optimised bonding system helps use the abrasive particles more efficiently. The stones therefore retain their working properties for a relatively long time, although their flatness still needs to be checked regularly.
Wide range of grits
From coarse repair stones to extremely fine polishing stones. Users can create a progressive sharpening sequence according to the condition of the knife, the steel used and the desired result.
Main SHAPTON sharpening-stone ranges
SHAPTON Kuromaku
Kuromaku is the classic range of solid synthetic sharpening stones. Individual grits are colour-coded, making it easier to distinguish between multiple stones while working. Each stone comes with a practical plastic case that can also be used as a base during sharpening.
SHAPTON GlassStone
The GlassStone range uses a thin abrasive layer firmly bonded to a glass base. The glass support provides dimensional stability and makes even a thin abrasive layer easier to handle. The extensive grit selection allows users to build a progression from basic sharpening to an exceptionally fine finish.
SHAPTON RockStar
RockStar is a modern premium range combining strong abrasive performance, a uniform structure and a finely controlled result. It is also designed for hard blades and users who want fast work without long soaking.
Which SHAPTON grit should you choose?
The brand or product range itself does not influence the result as much as choosing the correct grit. A coarse stone removes steel quickly, while a fine stone smooths the marks left by previous sharpening and refines the finished edge.
| Grit | Suitable use | Who it is suitable for |
|---|---|---|
| #120–#500 | Repairing a damaged edge, changing the bevel and working on a very dull knife. | More experienced users and repair sharpening. |
| #1000 | Restoring ordinary working sharpness and creating a new cutting edge. | The best first stone for most kitchen knives. |
| #1500–#3000 | Smoothing the bevel and providing a finer finish after basic sharpening. | Home cooks and more demanding users. |
| #4000–#8000 | Fine finishing and polishing of high-quality kitchen knives. | Japanese knives and blades requiring a smooth finish. |
| #12000–#16000 | Extremely fine specialised polishing after the previous stages. | Experienced sharpeners and specific edge-surface requirements. |
A simple recommendation for beginners
When buying your first sharpening stone, begin with #1000 grit. Add a #3000 stone for a finer finish. A coarse stone around #320 or #500 makes sense when the edge is damaged or significantly dull.
Maintaining SHAPTON sharpening stones
During sharpening, the working surface of every water stone gradually wears and may become hollow in the centre. An uneven stone makes it harder to control the angle and can result in an irregular bevel. It is therefore important to clean the surface continuously and flatten it when necessary.
- Moisten the stone before use according to the instructions for the specific range.
- Keep sufficient water on the surface while sharpening.
- Remove sharpening slurry and metal particles after use.
- Check the flatness of the working surface regularly.
- Allow the stone to dry naturally away from direct heat.
- Store the dry stone so that it cannot fall or suffer mechanical damage.
Holders, lapping tools, cleaning discs and other equipment can be found in the sharpening accessories category.
Would you like to learn how to sharpen correctly?
A high-quality sharpening stone is only part of the solution. Maintaining a stable angle, creating a burr, applying pressure correctly and progressing through the individual grits are equally important.
View the knife-sharpening course ›Frequently asked questions about SHAPTON
Where does the SHAPTON brand come from?
SHAPTON is a Japanese company based in the town of Mashiko in Tochigi Prefecture, Japan.
What makes SHAPTON sharpening stones special?
They stand out for their fast abrasive action, high abrasive content, good dimensional stability and wide choice of grits.
Do SHAPTON stones require long soaking?
Usually not. SHAPTON stones are designed for quick use after the surface has been moistened with water. Always follow the instructions for the specific product.
Which SHAPTON stone should I choose first?
For ordinary kitchen knives, #1000 is the most universal grit. It restores the working edge without removing material as aggressively as repair stones.
What is the difference between Kuromaku, GlassStone and RockStar?
Kuromaku stones are classic solid, colour-coded stones in a case. GlassStone uses an abrasive layer on a glass base. RockStar is a modern premium range with fast and even abrasive action.
Are SHAPTON stones suitable for hard Japanese steels?
Yes. A correctly selected SHAPTON stone can also be used on many hard Japanese steels. The appropriate grit, a stable angle and moderate pressure are decisive.
Can tools also be sharpened on SHAPTON stones?
Yes. Depending on the chosen range and grit, they can also be used to sharpen chisels, plane irons and other cutting tools.
Why does a sharpening stone need to be flattened?
The stone may wear unevenly during use. A flat surface improves angle control, blade contact and the consistency of the finished bevel.
Need help choosing?
We will help you select a suitable SHAPTON range and progressive grits according to the knife type, condition of the edge and your experience. Contact Dellinger on +420 702 049 048 on working days between 7:30–16:00.
| EU representative of the manufacturer : | Dellinger s.r.o. |
|---|---|
| Address of the EU representative : | Rižská 1580/7 102 00 Praha |
| Email of the EU representative : | saleseu@dellinger.cz |