About rust

Rust, oxidation, is the unique characteristic of our knives.

The surface of our knives will be oxidized by some reasons. Oxidation changes the color of the surface.

Rusty knife

 

This oxidization can be removed by erasers easily.

Remove rust by eraser

Before after remove rust from kitchen knife

Rust is not harmful for our health. Some people don't remove it. 

Why our knives get oxidize?

Materials of our knives are Hagane (carbon steel) and iron. Most of other knives are made by 100% stainless steel. Old time, stainless steel are not hard enough to make knife. Technology solved that problem. Some stainless are same hardness with Hagane (carbon steel), and it doesn't get rust. It's convenient materials.

 

Why we use Hagane (carbon steel)?

1. Cutting feeling

Because cutting feel are different from high-tech materials. The difference is not obvious. It's a bit. Some people feel it, some don't. 

2. Easy sharpening

If you sharpen your knives by stones, you can see the difference between Hagane knife and newer materials. The difference is not obvious either. It's a bit. Some people feel it, some don't. 

3. Felling precious

I feel preciousness from Hagane knives even the low price one. It cannot be explained by word. 

All 3 reasons are small thing and subjective. Only some people feel it, majority of people don't.

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Conclusions:

Our knives get rust. It doesn't harm our health. It can be removed by eraser.