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how i achieve a Hamon

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KHalverson:

--- Quote from: ssgtchad on February 19, 2019, 01:32:54 pm ---Does your clay/refractory puff up while being heated?

--- End quote ---


yes.
i had some imperial brand that didnt.
it doesnt seem to effect things though.
i have let it air dry over night and it will still puff up.

KHalverson:
next I quench the blade in a vertical position.
I move the blade back and forward to help speed cooling.
never stir the oil  from side to side with the hot blade .
this can cause warping.



here it the blade coming out of quench.
it is not uncommon for some of the refractory to fall off as the blade cools.




here the blade is cool and with most of the refractory removed with a putty knife.



i then use dish soap a small wire brush to scrub off the residual oil and refractory cement.

KHalverson:
after degreasing I like to clean the blade up with 120 grit paper .
then off to temper.



here is the blade after 2 hours @ 375F .
if you look the hard portion of the blade is a slightly different color than the softer steel.
this tells me we have a hamon of some sort.

KHalverson:
next step is to sand to a 320 grit.thats just my personal preference you can go higher if you so choose.



here we are @ 320 the little lightening bolt looking thing is the hamon being exposed by sanding.




next we get out the vinagar and insulated coffee cup.
this will be used to etch the blade giving it a patina while exposing the hamon.



next i heat the vinagar to just boiling and add it to the coffee cup with the knife already in it.
i use a piece of wire for a handle.
the vinagar will start to fizz.
dont be alarmed its just doing its job etching.

Pappy:
Thanks Kevin, how long do you leave it in the vinegar ? I did the one you talked me through about the same but didn't put anything on the edge as you did, is that a real problem ? also didn't heat the oil, I use burnt motor oil. That blade looks really nice, just beautiful.
  Pappy

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