Basics
Cast nylon colours and what they mean
Colour makes the material easy to recognise on site. Saying "this colour is better" from a glance can mislead.
Common colours
| Colour | What it usually means |
|---|---|
| Yellow | Pigmented standard cast nylon, the best known look |
| Cream (natural) | Close to the natural colour |
| Black | Often a MoS2 grade |
| Blue and others | Pigmented or filled grades, depending on the maker |
We work with yellow and cream cast nylon. You can see both in our parts photos.
What colour changes
- Appearance: how the part looks on the machine.
- Recognition: yellow sets the material apart from metal and other plastics.
- Behaviour, if there is an additive: black MoS2 or coloured oil-filled grades behave differently in sliding.
What colour alone does not tell you
Two products of the same colour may come from different makers with different additives. Ask:
- Is the material cast PA6G?
- Does it contain an additive such as oil or MoS2?
- What are its technical values?
See oil-filled and MoS2 cast nylon.
Practical tips
- In a workshop where mix-ups are possible, use different colours for different jobs.
- For food or special sectors, documents and declarations decide, not colour. Ask at the quote stage.
- For parts in the sun, allow for fading. Polyamide does not handle long sun exposure well.
Practical benefits on site
- Quick recognition: a yellow part stands out on the machine.
- Wear tracking: wear dust and burrs are easier to see on bright material.
- Storage: keeping grades in different colours reduces wrong material use.
Is colour change over time normal?
Polyamide can change colour with light, heat and time. Cream parts can yellow and yellow parts can darken. Surface colour change alone does not mean the part has failed. Check the part if the surface is chalky, cracked or brittle.
Choosing a colour
| Need | Suggestion |
|---|---|
| Easy to see on site | Yellow |
| Natural look | Cream |
| Wear-heavy job | Check the additive first, then the colour |
| Series part tracking | One colour per grade |
| Outdoors | Ask about sun resistance, not colour |
Choosing from a photo
The colour on screen can differ from reality. Light, camera and screen settings change it. If shade matters, ask for a sample or add a photo of your current part to the request. Small shade differences between batches are normal. If appearance is critical, say so at the start. See the quote guide.
Frequently asked questions
Is yellow or cream cast nylon better?
Colour alone gives no advantage. At the same grade, mechanical behaviour is similar. Choose by need.
Why can black cast nylon cost more?
Black often comes from a MoS2 additive, which can raise material cost.
Can you make special colours?
It depends on the maker and quantity. Write the colour in your request and we will confirm.
Figures are typical values published by manufacturers and vary with grade and test conditions. Ask us for exact values.