About This Item
Mikawa Shiro Nagura Botan 6.2oz. (173.6g)
The Sharpening of the razor blade that is two stages before the final finishing hone (botan, chu nagura), or one process before using Nakayama or finest grit whetstone (koma, mejiro, and tenjyo).
It is from the same mine as Mikawa Shiro Nagura in Aichi prefecture. Koma, Mejiro, and Tenjyo are almost the same grit (medium-high grit). Botan, Yae-Botan, Chu-nagura (Atsu) are one lower grit (medium grit). There is also one lower grit Ban. There are three more layers, but they cannot use as sharpening stones. Totally, they have 10 layers in Mikawa Shiro nagura. After using the fine finish whetstone like Nakayama whetstone for a long time, the razor or the fine finished blade gets dull, and then the blade of edge needs little rougher whetstone with sharpening.
Shiro Nagura whetstone is needed in the situation.
Mikawa Shiro Nagura is also for; Super hard whetstone to make it easier to sharpen, and it makes to increase whet power by taking out stuck residue or unwanted molecules on the surface of whetstone, and removing dull shaped whetstone molecules, and getting new layers of sharp cornered the whetstone molecules. Whetstone that makes scratches to the blade becomes fewer amounts of scratches as buffer. It makes preventing vibration during sharpening fine grit sharpening stone by using shiro nagura lapping.
How to use:
Making a wet finest grit whetstone on the bottom( Nagura with minimum water at the beginning), Rubbing Nagura on the surface of the finest grit whetstone gently little while until getting slurry on the bottom fine grit whetstone. We do not need too much slurry. Too much slurry does not work well. If it became light milky slurry, it should be good enough slurry amount. If there is sharp corner on Nagura, it should sand it down little bit by rough grit or medium grit stone, because the corner of Nagura might chipped in the slurry. It makes chipping the blade edge.
If there is higher spot like corner of the whetstone, we should often rub with Nagura at there to make the surface of finest grit whetstone to be flat.
Actually, perfect flat surface is ideal.
After getting slurry from Nagura, it is ready to start on sharpening razor as medium-high grit sharpening.
After finished sharpening with Nagura slurry, it should be washed away the razor and finest grit whetstone by clean water very well, and then start sharpening the razor blade on the finest grit whetstone with little bit water without Nagura. If you have Tomo Nagura which is the same as the bottom side of the finest grit whetstone, you may use Tomo Nagura to generate the slurry.
If you do not have Tomo Nagura, that is fine. It just takes little more time to get slurry.
If we have done the processes very well, we do not need Shiro Nagura little while.
When the blade gets dull again with just fine grit whetstone, we need Shiro Nagura again.
There are many fake Nagura and some other Nagura from different places, so Mr. Asano who lived near Shiro Nagura mine in Aichi prefecture in Japan. He had been a teacher for a barber school, started stamped on the Jun Mikawa shiro Nagura and inspected by Asano Stamp with red ink for helping barbers to avoid getting low quality Nagura. He also did lots of great works for barbers, and he passed away long time ago. Now, someone else uses the same stamps, and puts on even inspected by Asano stamp, and puts on the same stamps on the Shiro Nagura (it looks what they want to be monopoly for Shiro Nagura, however Shiro Nagura came from the same mine that are Shiro Nagura even without the stamps).