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Kanshitsu (4) - Jinoko-sabi (coarse-grained base paste).

I am working on bodies made of hemp cloths and urushi (Japanese lacquer) with a technique called kanshitsu.
Illustration of Cross Section
Partial enlargement of a cutaway drawing of kanshitsu (illustration). The order of the procedure is as follows: plaster mold, base, linen, primer, and urushi (Japanese lacquer) for painting.
The previous processes

Kanshitsu (1) - Making plaster molds

I made molds in plaster...

2025.01.26

Kanshitsu (2) - Mold releasing agent.

I applied a release agent to the plasters.

2025.02.20

Kanshitsu (3) - Tonoko-sabi.

I applied tonoko-sabi (fine-grained base paste) ...

2025.04.21

I applied jinoko-sabi (coarse-grained base paste) after tonoko-sabi dried on the box. Generally, I apply the base paste once a day.
Jinoko-sabi is used after sifting through a #100 sieve.
I made those sieves before and they were made of two types of thin metal mesh sheets, #100 and #120, cut and affixed to the tubes and hardened with urushi (Japanese lacquer).
I made those sieves before and they were made of two types of thin metal mesh sheets, #100 and #120, cut and affixed to the tubes and hardened with urushi (Japanese lacquer).

Sifted jinoko (stone powder) is mixed with water and ki-urushi and it's applied to the box. After it dries and hardens, briefly smooth it with sandpaper and apply a second coat of jinoko-sabi.
Sifted jinoko (stone powder) is mixed with water and ki-urushi.

After two coats of jinoko-sabi, it is possible to proceed to the next step, but I applied three coats of jinoko-sabi to make it thick enough for shaping later.
After jinoko-sabi has dried and hardened, I use a piece of whetstone for water polishing, and then shape the surface before proceeding to the next process (hemp cloth application).
Kanshitsu work：I applied jinoko-sabi (coarse-grained base paste) after tonoko-sabi (fine-grained base paste) dried.


2025.04.30