Satanite - Clay for quenching lines - Hamon clay

Satanite - Hamon clay

Get beautiful quenching lines / hamon with the Satanite clay ! How to make quenching lines / hamon on your knife blade ? How do you make hamon on your blade ? First step : use Satanite ! Satanite is a clay that allows you to obtain superb quenching lines on your blades. By isolating th...

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Pot de 500 grammes / 500 grams jar Bientôt disponible
€18.00 €15.00  Excl. Tax

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Get beautiful quenching lines / hamon with the Satanite clay !

How to make quenching lines / hamon on your knife blade ? How do you make hamon on your blade ? First step : use Satanite ! Satanite is a clay that allows you to obtain superb quenching lines on your blades. By isolating the sides and back of the blade from the heat during the heat treatment, Satanite allows the isolated parts to not take the hardening. Thus, it is possible to etch the demarcation between the two parts of the blade after the heat treatment, which is called the hardening line ("hamon" in Japanese).

Which steel grade do you use to make hamon ?

Not all steel grades will give good results when a knifemaker is looking to make hamon. It is best to use carbon steel grades with a simple composition and very little alloying. Thus, the carbon steels XC100 / 1095 and C130 will give excellent results, because they are highly charged with carbon. The XC75 / 1075, although with a lower carbon content, can also be interesting.

On the other hand, carbon alloy steels, even with a low carbon content, such as 80Crv2 or 90MCV8, will not give satisfactory results when you want to make a hardening line on the blade of your knife, because of the alloying elements present in their composition.

How do you use the Satanite hamon clay ?

To obtain the best possible results, it is necessary to follow a few steps to use Satanite correctly. Below are some tips from Tanguy Coillot, a french knifemaker whose work can be seen (and enjoyed !) on his website, his Facebook page and his Instagram.

  • Start by diluting some Satanite in water, in an airtight container, until you get a creamy, almost liquid consistency.
  • The blade you want to apply the Satanite on should be properly degreased, and ground with a coarse grit (60) so that it will grip properly on the blade surface.
  • Apply the Satanite in a thin layer (1mm maximum) on the first side of your blade and let it dry. You can accelerate the drying of the Satanite by using a thermical dryer - let it cool down afterwards.
  • Repeat the process on the second face of the blade.
  • Don't forget to apply the Satanite on the back of the blade as well, so that the layers don't come off during the hardening process.
  • When the Satanite is dry, you can proceed with the hardening: put your blade in the oven for the recommended holding time, then quench it in the hardening oil - preferably use accelerated oil, such as INO 235 quenching oil. The oil should be heated to about 40°C before immersion.

Once the blade is out of the oil, you can scrape off the satanite and run your blade on your belt grinder to check the appearance of your hamon. If you are satisfied with the result, you can then proceed to the tempering of your blade.

You can store the diluted Satanite in an airtight container. If you find that it has dried out, you can add more water and mix it up so that it is usable again.

How do you etch a hamon on a knife blade?

Once your blade is fully heat treated, you will need to etch your hamon. Different options are available, however, we recommend the following for good results:

  • Use ferro chloride, either in dry (diluted) or liquid form.
  • You will need to subject your blade to several baths of ferro chloride to obtain an optimal result. We recommend 10 baths of iron perchloride, each lasting about 45 seconds. You can also do less, but immerse the blade longer.
  • Between each bath, rinse and clean the blade with 000 or 0000 steel wool.
  • Once the successive baths are completed, neutralize the acidity on the blade in soapy water (dishwashing liquid).
 

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