Manufacturer · Fashion & Home Accessories
A black zip seems an easy choice, but black in textiles has many shades – with a reddish, bluish or greenish undertone, more saturated or more greyish. For black fabric, choose a black zip compared directly on the fabric in daylight and quote the specific number from the colour card. That way the zip will not look grey or brownish next to the fabric and will be the same in every delivery.
Why a black zip is not always black
Black in textiles is achieved by combining dyes, not with a single "black" dye. Depending on the recipe, the result has a slight undertone:
- Bluish black – cool, looks very deep; common on polyester tapes.
- Reddish or brownish black – warmer, noticeable next to a cool black fabric.
- Greenish black – rare, but visible under certain lights.
- Greyish black – less saturated, looks faded next to a deep black fabric.
The fabric also has an undertone, and it depends on the material: cotton, wool, viscose and polyester take black differently. That is why "a black zip for black fabric" requires a comparison, not just the word "black".
Typical problems with black zips
| Problem | Cause | Solution |
|---|---|---|
| The zip looks grey next to the fabric | The fabric is a deeper black | Choose a deeper black from the card |
| The zip looks brownish | Warm undertone of the tape | Compare in daylight, choose a cooler shade |
| Different blacks in one order | Different numbers or suppliers | One number for all items |
| The black zip fades | Fabric and tape react differently to washing | Test a washed sample |
| They differ under shop lighting | Metamerism | Compare under two light sources |
Black or navy zip
Many navy fabrics look almost black, and many blacks look navy under certain light. So with dark fabrics ask: what is the fabric in daylight? If it is navy, a black zip will look like a "hole" in the garment; if it is black, a navy one will look like a mistake. Compare samples of both colours directly on the fabric, in good light.
Black zips for different products
Invisible zip on a black dress
Only a thin line and the slider are visible. Choose a black with an undertone close to the fabric. The slider is usually painted black. See our YKK invisible zips.
Coil zip on black trousers
The tape is visible when the fly is open. A close tone is required, but there is some tolerance. It is important that the locking slider has a finish that does not stand out – black or dark metal.
Metal zip on a black jacket or jeans
The tape is black and the teeth in a finish of your choice: black for a monochrome look, nickel for classic contrast, antique brass for a warmer look. More about finishes in our YKK metal zips.
Black zip on a coloured garment
A black zip on white, beige or bright fabric is a bold contrast. It works when the black is repeated in another detail – a print, logo or piping.
Slider and finishes on black zips
On a black zip the slider is often the most visible element. Possible options:
- painted black slider – for a fully monochrome look;
- black metal plating – with a slight sheen, a more premium look;
- matt black – a modern, urban look;
- nickel, gunmetal or antique brass – for deliberate contrast.
Black finishes can wear at the edges over time and reveal the metal underneath. For heavily used products, test a sample.
Black zips and washing
Black fabrics often fade with washing – especially cotton. The zip tape, if polyester, usually holds its colour better. The result: after several washes the fabric has turned greyish while the zip is still deep black and stands out. This is not a defect of the zip, but it is something to anticipate. Test a washed sample of the garment to see how the two materials change together.
How to order a black zip accurately
- Choose a number from the YKK colour card, compared directly on the fabric.
- State the line, gauge, type, length and slider.
- If you have several black fabrics in the collection, compare each one separately – sometimes one number suits all, sometimes not.
- Record the number in the tech pack and use it for every repeat order.
Do not just write "black" in the order. This is the most common reason for black zips that do not match each other across deliveries.
Black zips on different materials
The type of fabric determines how difficult a match is. With black polyester or polyamide, dyed with similar dyes to the tape, a match is usually easy. With black cotton, denim, wool and viscose the difference in dyes is greater and metamerism is more pronounced. Leather and faux leather have a characteristic black sheen that the tape does not replicate – a slightly deeper black is often chosen there so the zip does not look greyish. With velvet and fleece the pile absorbs light and the fabric looks darker than any tape, so compare from different angles.
How many black shades to stock
For most brands one or two black numbers are enough – one deep, neutral black for the main fabrics and possibly a second for specific materials. More variants complicate stock without visible benefit. If your collection is entirely black – for example eveningwear or urban clothing – it is worth testing each fabric separately.
Advice and ordering
Polkom is a Bulgarian manufacturer of garment accessories with over 30 years of experience and a supplier of original YKK zips. If you have black fabrics with different undertones and want to choose the right black zip, send us samples – we will suggest numbers and send samples for approval.
