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Shapton Blade Mastermind Blue Black #320
Product Features
The Kuromaku series has a blade with high grinding power
Shapton whetstones have a high abrasive content and strong grinding power, allowing you to sharpen your knife in a short amount of time.
In addition, there is no need to soak it in water for a long time before use; it can be used immediately after soaking for just 5 to 10 minutes.
Another feature is that the optimized binder maximizes the abrasive's performance, resulting in less chipping.
Uses of rough whetstones
A rough whetstone is used to sharpen knives that have nicks or chips, or knives that have almost lost their sharpness.
A coarse whetstone alone will not produce a sharp blade, so it is used in combination with a medium whetstone.
Enjoy sharpening your knives with whetstones using whetstones
Product Details
specification
- size
- Whetstone: 7cm x 21cm x 1.5cm
Holder: 8.5cm x 22.5cm x 4cm - weight
- Whetstone: 500g
Whetstone & holder: 600g
*The weight may vary slightly as there are individual differences in weight. - Granularity
- #320 (Rough whetstone)
Notes
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When you use a whetstone, the used area will become indented. In that case, please use a correction whetstone or similar to maintain it.
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Please use cold water, not hot water, as this may cause the whetstone to melt or crack. Also, please refrain from submerging the whetstone in water for long periods of time.
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Dry in the shade to avoid cracking.
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How to use a whetstone
- Before you start sharpening, be sure to soak the whetstone thoroughly in water. When no more air bubbles appear, remove it from the water.
*If the whetstone is left submerged in water, it may become loose and dissolve. Be sure to soak it in water just before sharpening.
*Natural stones do not absorb water, so do not immerse them in water.
*Water soaking time varies depending on the product. - If you place the whetstone directly on the surface, make sure to place it on a wet towel or similar to prevent it from moving in order to sharpen safely.
- During sharpening, do not rinse off the grinding residue. Instead, pour a small amount of water over the surface of the whetstone to prevent it from drying out.
- After sharpening, wash the whetstone thoroughly to remove any sharpening debris.
Maintenance method (surface repair)
- All whetstones wear down with use and become deformed, especially by becoming concave in the center.
- If you continue to use it as is, the blade will come into uneven contact and sharpening will not be performed properly, so make sure to always keep the whetstone smooth and level.
- After sharpening one or two pieces, use a correction whetstone or concrete (block) to grind the surface evenly.
FAQ
Yes, you can order items not listed online. Please feel free to contact us using the inquiry form.
Yes, we offer a fee-based gift wrapping at JPY660 per set (tax included). To request a gift wrapping, please contact us using the inquiry form.
Yes, but for online orders, we offer a free engraving service for knives only. Please select the desired engraving option, enter text and add the knife to cart. Engraving for products other than knives is only available at our physical store at Kappabashi, Tokyo.
Please feel free to contact us using the inquiry form. We are happy to make a quotation for your order. It would be helpful if you could first tell us the delivery address and the desired due date so that we can proceed smoothly.
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Delivery preferences
*Date of delivery can be requested for ONLY domestic shipment. *If you wish to have your knife inscribed, you cannot specify a delivery date and time. We will ship 1 week to 10 days after the order date.