Ro ( 絽 ) silk fabric is a thin, see through fabric used to make Hitoe ( 一重 | unlined kimono ). It is most often worn in hot weather, which in Japan is between the June to September months. Woven using Karamiori ( | Mojiri weave ), this is what makes the fabric easy to ventilate and gives it its line like gap effects known as (horizontal) eyes. Ro is made by weaving warp threads with an odd number of weft threads to create these see through eyes. Ro can be used in any part of Wafuku production, even undergarments. There exist 3, 5, 13 eye gaps known as Ohonro, Ranro which follows a gap pattern of 3-5-7, and Tatero where the gaps are made by reversing the gap process to an odd number of warp threads, creating vertical eyes.[1]
Machine Ro Weave with Embroidery (2019, CC4.0) Ineffablebookkeeper
Ro began to made in the Edo period (circa 1600) and existed to be worn as formal summer wear for the rich and monks. Sha fabrics (a more transparent Gauze like weave) was the basis for the Ro weave, with Ro created to allow finer types of dyes and patterns to be made onto the textiles surface often using stencils, painting and sometimes embroidery.[1][2] This allowed patterns like the Mon to be added to Kimono without the blurring effect of Sha fabrics. During the industrial age, mass produced Ro fabrics began to made using the Leno weave and may have made the majority of exported and everyday Ro fabrics during the 19th century and early 20th century.[1] It seems hitoe were also popular with quite a number of the liberally minded living in Edwardian Japan.[3] In the modern day, Tomesode, Houmongi, Tsukesage, Komon, Nagajuban, and detachable Eri are made using Ro, but this is dwindling with the death of new buyers.[1]
Bibliography
[1] https://rosha.jp/faq/02_about_ro-sha/ro_sha_chigai/
[2] https://bellatory.com/fashion-industry/kimono-fabrics
[3] My dodgy 1920s own research into art movements and writers circles.
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