kamisoriharnisch
Uchigumori Renge・Natural Polishing Stone・Awasedo・Kyoto, Japan #2
Uchigumori Renge・Natural Polishing Stone・Awasedo・Kyoto, Japan #2
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Uchigumori from the Mizukihara area of Kyoto. Slightly soft, approximately 8000 grit. Traditionally associated with ha-duya work and valued for producing a refined kasumi finish. Supplied unflattened, in accordance with traditional sword-polishing practice. The User would form the stone exactly to their needs. This stone has a fine Renge or Lotus pattern. For normal knife sharpening and Razor sharpening we recommend to flatten it after purchase and give it a light chamfer. Flattening can be done with a diamond lapping plate.
You will receive the exact stone shown including the original box.
Full Description
Full Description
Traditionally Uchigumori is not intended to function as a conventional flat sharpening stone.
For Japanese swords, the stone is shaped with a slightly rounded (kamaboko-like) surface to match the curvature of the blade.
However, for kitchen knives or razors, a flat surface is perfectly suitable and recommended.
Supplied in its natural state, the stone leaves decisions about preparation and use to the practitioner.
Materials
Materials
Natural Whetstone - Uchigomori Renge
Measurements
Measurements
Length: 18cm
Width: 6,5cm
Height: 2,3cm
Weight: 746g
Hardness: ●●○○○ (2/5)
Care Guide
Care Guide
To preserve the character, performance, and longevity of your natural Japanese whetstone, please follow these care guidelines:
1. Keep the Stone Flat
Natural stones wear more slowly than synthetic stones, but regular flattening is still essential for controlled sharpening. Use a diamond lapping plate or a suitable flattening stone to maintain a flat, even surface. Avoid aggressive lapping unless necessary.
2. Use Water Only
Natural Japanese whetstones are designed to be used with water. Lightly wet the surface before use. Some stones benefit from a brief pre-wetting, while others should not be soaked for extended periods. Do not use oil or chemical additives.
3. Slurry Management
Depending on the stone, slurry may develop naturally during use. This is part of the sharpening process and should be managed gently. Avoid excessive pressure or artificial slurry generation unless intentionally desired.
4. Clean After Use
After sharpening, rinse the stone thoroughly with clean water to remove metal particles and residue. Use a soft brush if needed. Do not use soap, detergents, or abrasive cleaners.
5. Dry Slowly and Naturally
Allow the stone to air dry completely in a shaded, well-ventilated area. Avoid direct sunlight, heaters, or rapid temperature changes, as natural stones can crack if dried too quickly.
6. Store with Care
Store the stone in a dry, stable environment. Avoid damp locations and protect the stone from impacts or sudden temperature changes. If stored long-term, ensure the stone is fully dry before placing it in a box or wrapping.
7. Inspect Before Use
Before each use, rinse the surface and ensure it is free from dust, grit, or foreign particles. Any contamination may cause scratches on the blade and compromise sharpening results.
By following these guidelines, your natural whetstone will retain its unique sharpening characteristics and provide consistent, controlled results over time.
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