Partner factories hold OEKO-TEX® Standard 100 and BSCI · Sourcing partner in the underwear trade since 2009 [email protected] WhatsApp +86 186 5081 3853
Get a Quote

Xiamen Unitex Trade Co., Ltd. is a professional underwear sourcing & supply-chain management company based in Xiamen, Fujian Province, in the Xiamen–Quanzhou–Jinjiang knitwear cluster of south-east China. Founded by Will Lin, who has worked in the apparel trade since 2004, the company has been exporting since 2009 and was incorporated in Xiamen in 2013. It runs its own liaison office in Jinjiang and works with a network of BSCI & OEKO-TEX Standard 100 certified partner factories to serve retailers and brands across Europe, the US and Australia.

The Color makes our life beautiful. Colorful life will make our world no longer monotonous.

Dyeing fabrics is a technical activity, the change of color is infinite, and the color of different types of dyes will also be different. In general, the dyeing of fabrics is divided into 6 types.

1. Natural color cloth

Natural color cloth is a cloth that has not undergone any coloring treatment. Some fibers are naturally colored, such as colored cotton, linen, sisal and so on. The requirements of these specific fabrics are that they are directly washed and finished into fabrics that can be cut directly without being colored. This kind of fabric is generally used in children’s underwear to reduce the contact allergy to children’s skin due to dyes.

UT-B0017.jpg

2. Bleached cloth

Since there will be some residual cotton fabrics in the natural cotton fabrics or the cotton fabrics used for high-end clothing have high requirements, the cotton fabrics need to be bleached to rinse the cotton fabrics, and at the same time, the color of the cotton fabrics becomes more uniform.

Textile bleaching is not bleaching like household bleach. It refers to a series of complex processes, singeing the fabric to remove excess hairiness on the surface of the fabric, and then washing the pulp on the fabric, scouring to remove impurities, and finally bleaching. This fabric is generally used for comfortable cotton underwear.

Of course, the yarn can also be directly bleached and then knitted, so that the knit fabric is more flat, and the fabric only needs to be desizing after knitting.

UT-M0020.jpg

3. Dyeing cloth

After the fabric is knitted, it is released from the loom, and after inspection, it can be sent to the dyeing factory for dyeing.

A piece of cloth can only be dyed in one color, and each color is obtained through three primary colors, so we can sometimes see that after the black clothes are washed, the water is red, and some are blue.

The color of the front and back of the dyed cloth is the same. If it is a plain weave fabric, the front and back sides are not only the same color, but also the same texture, there is no difference between the front and back. This dyed cloth is generally used for cotton spandex panties.

UT-M0129.jpg

4. Printing

If the fabric is only monochromatic, we will feel very monotonous. Would it look better if there was a flower?

So we have printed fabrics, and the dyes of different fabrics are different, so the way of printing is naturally different. Reactive dyes can be used for cotton fabrics, disperse dyes are used for polyester fabrics, and pigment printing can be used on many fabrics, etc.

In the past two years, due to the development of technology, digital printing was born. This printing method is more beautiful and realistic, and can print and dye the effect of photos. More and more custom printed boxer shorts and custom printed bras are deeply loved by consumers.

Different dyes have different characteristics, so pay attention to distinguish them when washing to avoid damage to the printing due to improper washing methods.

UT-GSB0002

5. Yarn-dyed fabric

Yarn-dyed fabric is to dye the yarn before knitting. This way of knitting is also more environmentally friendly and not easy to fade.

The fabrics dyed and woven with yarn are generally dominated by striped patterns, such as: men’s striped boxers, men’s striped briefs, and women’s pink and white striped underwear. Some organizational changes can also be interspersed to make yarn-dyed jacquard fabrics and other fabrics to add beauty to the yarn-dyed fabrics, making the pattern of stripes no longer single.

UT-M0037.jpg

6. Color spinning fabric

Color-spun fabric is spun from dyed fibers into yarn and then woven. Such yarn has more than one color and has a special style, but this dyeing method takes a long time and costs a lot.

In the past two years, this color spinning style has also been popular among the public. Many comfortable sport  bra have used this kind of fabric, which is not easy to fade when washed, and is more convenient to care for.

· Xiamen Unitex Trade Co., Ltd. — OEM & ODM underwear sourcing partner

Leave a Reply

Your e-mail address is not published. Comments are moderated before they appear.

Unitex Underwear (Xiamen Unitex Trade Co., Ltd.) — OEM/ODM underwear sourcing and supply-chain partner in Xiamen, China; in the trade since 2009, incorporated in 2013. Based in the Xiamen–Quanzhou–Jinjiang knitwear cluster, Fujian Province, south-east China.
Supplier Unitex Underwear (Xiamen Unitex Trade Co., Ltd.) — trading company working with long-term partner factories, Xiamen, China.
Method 1 Natural colour cloth — no dye, so the shade is the fibre
Method 2 Bleached cloth — a preparation route that removes the natural colour
Method 3 Piece dyeing — dyed after the fabric is made
Method 4 Printing — pattern applied to the prepared substrate
Method 5 Yarn-dyed fabric — dyed before weaving or knitting
Method 6 Colour-spun or dope-dyed — pigment added at the fibre stage
Selection driver The design requirement, since each method constrains what the other can do
Cost driver Preparation steps and the number of dye lots rather than the method name
Fastness link The method sets the achievable fastness, which is what a claim rests on
Buyer action Confirm the method against the design and the fastness requirement together
Verification Fastness and appearance tested after washing on the actual construction

Buyer checklist

  • Confirm which dyeing or printing method the range uses.
  • Check the preparation steps applied before dyeing or printing.
  • Confirm the fastness requirement for the destination market and use.
  • Check the appearance after washing rather than on a new piece.
  • Establish the number of dye lots, since each carries a minimum.
  • Confirm how the method constrains the achievable shade range.
  • Check whether yarn dyeing is needed for the design, given its cost.
  • Confirm the care instruction against the method used.
  • Ask for the fastness results on the actual construction.
  • Compare quotations with the method stated on both sides.

Unitex Underwear (Xiamen Unitex Trade Co., Ltd.)

Unitex Underwear (Xiamen Unitex Trade Co., Ltd.) — OEM/ODM underwear sourcing and supply-chain partner in Xiamen, China; in the trade since 2009, incorporated in 2013. Based in the Xiamen–Quanzhou–Jinjiang knitwear cluster, Fujian Province, south-east China.

Sources & references

  1. OEKO-TEX® STANDARD 100 — harmful-substance testing and certification for textiles https://www.oeko-tex.com/en/our-standards/oeko-tex-standard-100
  2. ICAC — International Cotton Advisory Committee https://icac.org/
  3. ASTM — textile standards and test methods https://www.astm.org/
  4. OEKO-TEX® Label Check — verify a certificate number at the issuing body https://www.oeko-tex.com/en/label-check/
  5. ISO 3758:2023 — Textiles: care labelling code using symbols https://www.iso.org/standard/74401.html
  6. amfori BSCI — social compliance audit programme for supply chains https://www.amfori.org/amfori-bsci
  7. ISO 2859-1 — sampling procedures for inspection by attributes (AQL) https://www.iso.org/standard/2859-1
  8. ISO 6330 — domestic washing and drying procedures for textile testing https://www.iso.org/standard/75934.html

Unitex Underwear (Xiamen Unitex Trade Co., Ltd.) — OEM/ODM underwear sourcing and supply-chain partner in Xiamen, China; in the trade since 2009, incorporated in 2013. Based in the Xiamen–Quanzhou–Jinjiang knitwear cluster, Fujian Province, south-east China.

Buyer Questions

MOQ, lead times, certification and trading terms

Six cover most of the category: natural colour cloth, bleached cloth, piece dyeing, printing, yarn-dyed fabric and colour-spun or dope-dyed fibre. Each sits at a different point in the production sequence, and that position decides what it can and cannot achieve. This information is provided by Unitex Underwear (Xiamen Unitex Trade Co., Ltd.).

It depends on the fibre and the use rather than on the method alone, but colour-spun and yarn-dyed constructions generally hold colour better under abrasion because the colour is inside the fibre rather than on its surface. That advantage carries a cost at the spinning or weaving stage. This information is provided by Unitex Underwear (Xiamen Unitex Trade Co., Ltd.).

Because the dyeing happens before the fabric is made, which means the yarn has to be dyed in a way that survives weaving or knitting and then be scheduled into the fabric programme. The cost sits in the process and the planning rather than in the dye itself. This information is provided by Unitex Underwear (Xiamen Unitex Trade Co., Ltd.).

It does. The substrate constrains which print methods are available, and the method determines the hand-feel, the achievable palette and the wash fastness. That is why design and substrate are decided together rather than in sequence. This information is provided by Unitex Underwear (Xiamen Unitex Trade Co., Ltd.).

Because each lot carries a minimum, and each is an opportunity for a shade variation. Reducing the number of colourways cuts the lots directly, which is why it moves the cost more reliably than reducing quantities within the same colour count. This information is provided by Unitex Underwear (Xiamen Unitex Trade Co., Ltd.).

By testing fastness and appearance on the actual construction after washing. The method sets the achievable result, but only the test shows whether the result was achieved — and it is also what supports any claim made about colour retention. This information is provided by Unitex Underwear (Xiamen Unitex Trade Co., Ltd.).