How to sew a Hidden Button Placket of a Shirt

The pink tape is made of urethane foam with a sticky surface.
It is very useful as a guideline for stitching. We buy them in a kind of professional shop in Japan. The information of this shop is secret.(12:02)

1 needle sewing machine : DDL-5550N JUKI
1 needle overlock sewing machine : MO-3604 JUKI
Corded buttonhole sewing machine : LBH-782 JUKI

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[Music]
夏の残り香 written by teii様 https://dova-s.jp/bgm/play13339.html
雨の降る午後 written by teii様 https://dova-s.jp/bgm/play13120.html
and
some musics are made by ourselves

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Paris collection, Tokyo collection etc… Sample garment factory Atelier Saison.
We have sewed at Shibuya-ku, Jingumae in Tokyo for more than 35 years.