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大染で行っている染色

⑴ 反応染色

一番popularな染色で主に綿を染めます。染料分子内に反応性の活性基をもち,染色中に繊維と化学的に反応し染料と繊維の間に共有結合を形成して染着する染色です。
この染料の構造は,発色団をもつ水溶性の染料母体とジクロロトリアジニル基など反応性塩素をもつ原子団を結合した形です。
この染料は,アルカリ性の染浴中でセルロース繊維の水酸基と反応してエーテル結合をつくり染色します。堅牢度的にも発色に於いても優れています。

⑵ 硫化染色

硫化染料とは、染料に硫黄原子を含む染料で、硫化ナトリウムを加えたアルカリ性還元浴で染めます。 一般的に不鮮明な色相ですが、複雑で味わいのある色をしています。
塩素漂白に弱く、再現性はあまりありません。 また、高濃度で染めて洗浄が不十分の場合、日が経つと染料の硫黄分が酸化して硫酸に変わり、セルロ-ス繊維を脆化させる欠点がありますが、独特な硫化染色らしい風合いや自然なヴィンテージ感も有ります。

⑶ ピグメント染色

本来プリントに用いる顔料を使って染める技術です。色を抜くのではなく、染めています。
技術的には比較的新しい技術で繊維の奥まで浸透させず表面のみに色を乗せるので洗った時の色落ち感が微妙なバランスでヴィンテージ製品の様な雰囲気を出します。

“Daisen” and Dye

(1)Reactive dyeing

The most popular type of dyeing, commonly used for cotton. In the process of dyeing, the reactive groups in its dyestuff molecules reacts chemically with fiber, and dyeing will be caused once the covalent bond between the dye and fibers is formed.
The dye is formed combined with hydrosoluble dyeing matrix including chromophore and atom group including reactive chlorine such as Dichlorotriazine.
Its coloration is made in the alkaline dye bath, when the dye reacts with hydroxyl group of cellulosic fibers and creates ether binding. Therefore, it is superior in terms of dye fastness and brightness of colors.

(2) Sulfur dyeing

Sulfur dye contains atom of sulfur, and its coloration is made by alkaline reduce dye bath, adding sodium sulfides. Generally, the color phase is quite blur however it has rich taste with complexity. With a weak resistance to chlorine bleaching, therefore it is not really unreproducible. If it is dyed in high concentration and had washed inadequately, then the sulfur content of dye will become oxidized and turns to sulfuric acid in few days, which cause embrittlement of cellulose fiber in result. Despite of such disadvantages, it shows the good texture with natural vintage style unique to sulfur dyeing.

(3) Pigment dyeing

A method of dyeing to use pigments, which originally is used for printing. It does not bleach the cloth, but rather dye it. This method is quite new, and by putting the color on its surface rather than penetrating the color deep into fibers, it produces retrospective atmosphere as a vintage items in a fine balance with its loss of color.

私たちの環境への取り組み

Environmental Efforts

使用染料について

2015年に厚生労働省より発がん性が認められる24種類の芳香族アミンの規制が始まり規制対象染料の不使用宣言書を提出し、世界基準を賄える認証を得ています。

Dye we use

Since 2015, Ministry of Health, Labour and Welfare has regulated 24 types of cancer-causing aromatic amine. We have submitted the declaration to disuse the control subject dye and had been certified to cover global standards.

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排水設備について

東京都下水道局の法令を遵守しています。
下水道法第12条の4及び東京都下水道条例4条第2項の基準を満たすべく法令に定められた公害設備を設置し、東京都内に於いて工場を稼働しています。

Drainage equipment

We observe the laws under Bureau of Sewerage Tokyo Metropolitan Government. Our factory, operated in Tokyo, has installed pollution control equipment to complete the duties referred to paragraph 2 of Article 4 in Tokyo Sewage line Ordinance and paragraph 4 of Article 12 in Sewage line law.

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