Length: 21cm, Width: 7cm, Height: 2.5cm
Magnesia manufacturing method - a ceramic abrasive dried at room temperature with a magnesia cement binder. Not necessary to soak in water and being very hard and having high grinding power, Kuromaku series are one of the most popular ceramic whetstones. They are however, less forgiving whetstones as the blade may not get sharpened without precise angle to stone throughout the sharpening.
Please do not soak in water, just spray water onto the stone when using it.
Ceramic sharpening whetstone #1000. Ceramic is harder material than normal stones and it reduces your time for sharpening. #1000 is good for usual maintenance.
There are no knives that retain the best sharpness without sharpening. But why do knives lose sharpness? It is simply because of abrasion on the edge.
Edge abrasion occurs when it cuts food and hits a chopping board. (For saving long lasting edge, we recommend wooden boards over plastic ones) Each time you cut vegetables or meat, a sharp edge gets more rounded and dull through abrasion. Unfortunately, we cannot see how much the edge is worn off without a microscope.
For many knife users, honing steels are the popular choice. But in terms of retention of sharpness, it does not give good effects. On the contrary, it ruins a good edge in a long run.
Honing with a steel mainly helps remove dirt and oil from the edge so you may feel the edge is sharp with cleaner cuts. In fact, it has sharpening effects as the edge gets rubbed on a file.
However, it is almost impossible to sharpen with the same angle every time on a steel, so the edge gradually gets rounded shape, which gives adverse effects on edge retention.
If you want to take the full advantage of good knives, meaning not only good sharpness at a time but long lasting sharpness, please consider using flat whetstones for knives, regardless of Japanese, Western or Chinese knives.
Video: How to use sharpening stone.