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Unearthed
  • History of Murano Glass
  • • About Oshima Tsumugi Japanese Silk
  • Gianni's Leather Rose Video

Oshima Tsumugi - the Japanese Art of Silk-Weaving

by Emi Graziani

What is Oshima Tsumugi?

Oshima Tsumugi is a beautiful Japanese silk fabric that is manufactured through an unbelievably intricate and complex process. I use the term "unbelievable" because I fear some of you may not believe me as I outline below what is involved in making these fabrics. It is THAT amazing. Maybe telling you that it takes 6 months to a year to complete one single piece of cloth measuring less than 5 square yards will clue you in on the amount of work and craftsmanship that goes into each piece of work.

I've attempted to describe below the major steps involved in the process. Ready? Here we go ...

  1. THE DESIGN- the start of a journey. ... A looooong journey.

    Firstly, the intricate designs of the Oshima Tsumugi are drawn on graph paper - this becomes the blueprint of the dying and weaving processes. Hm, so far so good. Sounds like something you could do, right? Keep reading ...

  2. STARCHING - prepping the silk

    The silk threads are starched with a special type of glue made from seaweeds found in the seas of Amami Oshima. This is an important step that not only serves to prevent fraying of the threads, but also helps the threads better retain the color in the dying process. This step is repeated to ensure even dying at a later stage.

  3. BINDING - just like tie-dye! ... Not.

    In this step, the silk threads are bound to cotton threads according to the pattern blueprint. An overly simplistic analogy would be tie-dying a T-shirt: where the T-shirt is bound tightly, you get less dyeing than where it is not bound. Now, imagine applying that same concept ... except we're not talking T-shirts and rubberbands, but each individual silk thread that will become part of the finished fabric, and cotton threads with which to bind them. The cotton threads serve not only to protect the select portions of the silk threads from being dyed, but alsokeeps the threads aligned to a perfect grid formation throughout the subsequent processes. The unparalleled precision (and patience!) used in this binding process results in the intricate patterns of the finished product.

  4. DYEING - Dye x 20. Dye again. Repeat. Repeat. Repeat. Repeat ...

    OK, now that I've asked you to imagine the T-shirt tie-dying process, please shut that image out of your mind. Because dyeing the silk threads Oshima Tsumugi-style is nothing like dunking a T-shirt in a pot full of dye.

    First, you have to make the dye. (I told you it's not going to be easy!) Finely chopped Sharinbai branches and roots are boiled for two days in a large pot, then the extracts are set aside for 4-5 days. The threads are dyed in this extract 20 times, each time with a new vat of liquid.

    Dyeing part 2: the thread is then dyed in iron-rich mud. Aside from giving its signature brown-black color, the mud-dying process results in such added benefits as making the end product wrinkle-resistant, fire-retardant, stain-resistant, and anti-static.

    Done with dyeing? Not quite.

    These two dyeing processes must be repeated 4~5 times! And by the way, we're still not done with dyeing.

  5. MORE DYEING - MORE Dyeing!!!??

    So far we've dyed the silk threads in just one color - the brown-black color given by the Sharinbai and mud dyeing processes. If we want more color, we must do more dyeing.

    The cotton threads are unbound from the silk threads in those areas that require further dyeing. This reveals the white, underlying silk threads that were undyed in the previous steps. (You can flash back to the tie-dyeing example for a moment if it helps ... but once the theoretical understanding is achieved please remember to promptly shut that image out again.)

    Colored dyes are then rubbed into the silk threads one spot at a time, one strand at a time, according to the initial design layout. This process involves a tiny tiny syringe and a huge huge amount of patience. And a very keen keen eyesight.

    When this last dyeing process is completed, then all remaining cotton threads are torn off and discarded.

    And oh, by the way, in case you're thinking of doing this as a hobby ... it takes about 10 years for one to "learn" the proper dyeing techniques.

  6. WEAVING - or more accurately, matching the threads one spot at a time

    As you may have guessed, the weaving process is not any easier than the other steps. It demands skillful workmanship, as each row is carefully and meticulously threaded by hand. As each thread is woven by aligning it to the patterns on the other threads, the overall design slowly begins to emerge. After every 7cm or so worth of progress, one must carefully adjust the positions of the threads with a needle to ensure precise alignment of the design.

  7. INSPECTION - it ain't official til they say so

    It is now many months since we first laid out our pattern on paper, and finally, FINALLY the last silk thread has been woven to complete the masterpiece. But we're not done yet. The finished products must be sent to a special Oshima Tsumugi association to pass a rigorous 26-point inspection. How rigorous? Well, let's just say that it involves a panel of Oshima Tsumugi experts carefully reviewing every aspect of your product for the minutest error or disparity in quality. They will even bust out some test tubes for a chemical analysis of the threads, so don't even think about passing off mom's dusty old curtain as a genuine Oshima Tsumugi product!

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Now That You Know ...

You can fully appreciate the following products that utilize vintage Oshima Tsumugi fabric pieces:

Yoshioksa-san's Japanese Tapestries with Vintage Oshima Silk Textiles

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