4000 sharpening stone, GlassStone SHAPTON 50103HR
Code: SHA-50103HRProduct detailed description
Fine finishing for kitchen edges
Japanese SHAPTON GlassStone JIS #4000 sharpening stone
A premium water sharpening stone for fine finishing, smoothing the bevel and creating a clean, smooth and very sharp working edge.
SHAPTON GlassStone JIS #4000 is a fine Japanese sharpening stone designed for finishing an edge after basic sharpening. It helps remove marks left by coarser stones, smooth the bevel and create a fine kitchen edge with a clean cut.
The JIS #4000 grit with an abrasive-particle size of 3.68 μm represents a practical intermediate stage between basic sharpening and high polishing. It is suitable for quality kitchen and Japanese knives when you want a finer result than with a #2000 stone while retaining good cutting performance for everyday use.
The abrasive layer is mounted on a solid tempered-glass base. This increases stability, limits flexing of the stone and helps maintain a flat working surface. Thanks to its low water absorption, the stone does not require prolonged soaking – simply wet it with water before sharpening.
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Main advantages of SHAPTON GlassStone #4000
Fine and practical kitchen edge
The #4000 grit creates a smoother bevel and a cleaner cut than basic sharpening stones without requiring progression to extremely high polishing grits.
Fast sharpening and polishing action
The consistent ceramic abrasive works quickly and predictably, including on hard and highly alloyed steels.
Stable glass base
The tempered-glass base reinforces the thin abrasive layer, limits deformation and makes precise blade guidance easier.
Quick preparation for sharpening
The stone does not need prolonged soaking. Simply wet it with clean water and you can begin sharpening.
What is JIS #4000 grit used for?
- fine finishing after #1000 to #2000 grit,
- smoothing scratches left by basic sharpening,
- creating a clean and smooth working edge,
- quality kitchen and Japanese knives,
- hard, stainless and carbon steels,
- preparing the edge for subsequent polishing on a #6000 or finer stone.
Where does the #4000 stone fit?
| Grit | Main use | Result |
|---|---|---|
| #120–#500 | Repairs and coarse sharpening | Restoration of a very dull or damaged edge |
| #1000–#2000 | Basic sharpening and working edge | Good cutting performance for everyday use |
| #4000 | Fine finishing and smoothing | Clean cut and smoother bevel |
| #6000–#8000 | Fine finishing and polishing | Very smooth and finely finished edge |
| #16000 | Specialised polishing | Highly polished bevel for experienced users |
The #4000 stone is not intended for repairing a dull knife
If the edge is very dull, has chips or requires a new bevel, begin with a coarser stone. SHAPTON GlassStone #4000 is primarily designed for fine finishing of an already established edge.
Recommended sharpening procedure
- Wet the working surface with water. Prolonged soaking is unnecessary.
- Secure the stone in a stable holder. It must not move during sharpening.
- Choose the correct edge angle. For kitchen knives, it is generally approximately 12–20° per side.
- Guide the blade smoothly across the full surface. Use light to medium pressure.
- Keep adding water. The sharpening surface must remain wet during use.
- Finally, rinse the stone and allow it to air-dry.
Who is SHAPTON GlassStone #4000 suitable for?
We recommend this sharpening stone to users who have mastered basic sharpening and want to achieve a finer, smoother edge with cleaner cutting performance. It is suitable for home enthusiasts, professional chefs and experienced sharpeners.
- quality European and Japanese kitchen knives,
- hard stainless and carbon steels,
- thin blades and finely ground edges,
- finishing after a #1000 or #2000 stone,
- users who want a smooth but still practical kitchen edge.
Technical specifications
| Manufacturer | SHAPTON |
|---|---|
| Product line | GlassStone |
| Grit | JIS #4000 |
| Abrasive-particle size | 3.68 μm |
| Stone dimensions with base | 210 × 70 × 10 mm |
| Base | Tempered glass |
| Weight | 0.1 kg |
| Product code | SHA-50103HR |
| EAN | 4944509501032 |
| Country of manufacture | Japan |
Sharpening-stone care
- Use clean water, not sharpening oil.
- Rinse the stone thoroughly after sharpening.
- Allow it to air-dry at room temperature.
- Do not dry it on a radiator or in direct sunlight.
- Check the flatness of the sharpening surface regularly.
- Protect the dry stone from drops, impacts and frost.
Sharpening safety
The stone is not intended for ceramic knives. Always use a stable non-slip holder, guide the edge in a controlled manner and do not apply excessive pressure to the blade.
Explore more sharpening equipment
SHAPTON GlassStone
Build a progressive sharpening system from basic sharpening to extremely fine edge polishing.
View SHAPTON GlassStone stones ›Sharpening accessories
A stable holder, non-slip mat and tools for cleaning and flattening the stone make precise and safe work easier.
Choose accessories ›Learn how to sharpen knives correctly
During the sharpening course, you will learn to maintain the correct angle, create a burr, use different grits in sequence and finish the edge without unnecessary material removal.
View the knife-sharpening course ›Frequently asked questions
What is JIS #4000 grit suitable for?
It is used for fine finishing, smoothing the bevel and creating a clean, smooth and very sharp working edge.
Can the #4000 stone be used on a completely dull knife?
We do not recommend it. A very dull or damaged edge must first be restored on a coarser stone.
Which stone should precede #4000 grit?
A #1000 or #2000 stone is most commonly used, depending on the condition of the edge and the desired result.
Is #4000 a final grit for a kitchen knife?
Yes. For most quality kitchen knives, it provides a very fine and practical edge. Further polishing is optional.
Does SHAPTON GlassStone need to be soaked?
Prolonged soaking is unnecessary. Simply wet the sharpening surface with clean water before use.
Is the stone suitable for hard Japanese knives?
Yes. The abrasive is also suitable for hard and highly alloyed steels used in Japanese kitchen knives.
Can ceramic knives be sharpened on the stone?
No. Ceramic knives require specialised diamond abrasive and an appropriate sharpening procedure.
Why is the abrasive layer mounted on glass?
Tempered glass increases stability, limits flexing of the abrasive layer and makes precise blade guidance easier.
Need advice on choosing the right grit?
Call us at +420 702 049 048, Monday–Friday from 7:30 to 16:00. We will be happy to help you create a suitable progression of sharpening stones.
Additional parameters
| Category: | Shapton Glass – Stones on Glass Base |
|---|---|
| Warranty: | 2 years |
| Weight: | 0.1 kg |
| EAN: | 4944509501032 |
| 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 |