螺鈿 raden chogoro
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chogoro was started by Miyoko and Sawako Kojima.
They are studying under Yushiro Kojima who trained under the living
national treasure Tatsuaki Kuroda.
chogoro hopes to RADEN become more popular.
Our studio is in Tanba Hyogo Japan.

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小島美代子&紗和子
ABOUT RADEN
The works made with lacquer and shells are called Raden.
This techniques completed in China in about the 4th century at B.C.
It came to Japan form China 1000 years ago.
There are many masterpieces in Sho-so-in of Nara period.
Chogoro uses the same techniques as these.

The kanji 「螺」 stands for 「a conch」、the Kanji 「鈿」 stands for 「bury」.

Raden has three styles which are
・「UMEKOMI(embed) style」
・「HORIKOMI(carred) style」
・「OSHIKOMI(pusu)style」

chogoro mainly uses 「UMEKOMIstyle」 and 「HORIKOMI style」 which are the oldest and original techniques.

These techniques require tick shells. We mostly use -「Silver-lipped pearl oyster」 「Great green turban」 and 「Mexican abalone」

Ground work use Chinese lacker and finished with Japanese lacker.
Altogether we go through apply more ten times.
Whole process are about thirty.


※Making a base(Kanshitu)

How to make Kanshitu that is used as a bace.



At first, we make a mould useing sand or acrylic. Then we use Sabi-urushi(a mix of flour and lacquer)and Nori-urushi (a mix of rice, flour and lacquer) to paste several layers of hemp or mosquito net to the mould.


※The Raden process

1.Cutting shells and Pasting


First of all, the shells are cut into the designed shape and pasted to the bace(Kanshitu) with paste or laqure.

2.Sabitsuke(Paint Lacquer mixed with polishing powder)



After that, We need to paste Sabirushi(a mix of polishing powder and Lacquer)and grind several times to lose the ruggedness. This process takes more than a day to dry. The strength of the works are decided by this process.
※Finishing Touches

1.Togi (Grinding)



After Sabi-urushi is dry enough, the pattern of the shells are polished with a rough stone to flatten the shells and lacquer.

2.Shita-nuri, Uwa-nuri (Under coat , Final coat)



After grinding , paint the under coat and the final coat.

3.Mekuri (Remove the lacquer)

After it dries, we remove the lacquer on the shell pattern with a knife.


4.Do-zuri (To rub in the polishing powder)



We polish the work in water and polishing powder.

5.Tanpo-zuri (To rub with a pad)



We polish the work with lacquer using a soft cloth another two times.

6.Tsunoko-migaki (To polish in crushed antler powder)


After it dries, we polish with oil and crushed antler powder.
 
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