Case 3 Pikal:
Pikal is a polisher which is used in Japan.
I applied this polish at a part of the knife with a kitchen sponge.
Now maintenance with the Maruka fingerstone:
After 1 or 2min the Kitaeji pattern is back:
Case 4 Chromium(III) oxide (Cr2O3):
This polisher is sold in Japan as "Aobo" which means blue stick.
|Arrow is just indicating shadow of the "Aobo"|
|Cr2O3 polish with tissue paper|
The Cr2O3 polish was quite slow. It took me 5 min and still the Kitaeji pattern was still visible.
I used the Hakka fingerstone to regain the Kitaeji pattern and the result is here:
Polishing the Kitaeji with polishing agent which make mirror finish to soft iron will destroy the Kitaeji pattern.
I think some synthetic finishing stones does it too. (I did not do the test because I do not have fingerstones from synthetic finisher).
Regaining of the Kitaeji pattern is very easy with high grade natural fingerstones.
The contrast of the Kitaeji was:
The uniformity of the finish was Uchigomori=Maruka>Hakka
I have tested more than 10 other natural fingerstones which I did not make any pictures. The 3 fingerstones in this test are the best 3 of the fingerstones I have tested so far.
These 3 fingerstones can be used to the Kasumi finish too to make nice haze.