Rainbow gradient filament changes colour along the strand, so one spool can produce several visual effects. The result depends on segment length, model size and waste during purging. Plan the layout before printing.
Understand the gradient
- Colour changes with consumed filament length.
- Small parts may show one colour.
- Tall or long parts show more transition.
Plan the print
Estimate the length needed for each colour band and place models to use the transition. Purging and failed parts can shift the start of the next object.
Check appearance
- Print a sample with the final geometry.
- Use consistent lighting.
- Keep a reference for repeat orders.
| Factor | Effect | Control |
|---|---|---|
| Segment length | Colour span | Length planning |
| Model height | Number of transitions | Orientation |
| Purge | Colour shift | Group objects |
| Lighting | Perceived colour | Reference sample |
Common engineering mistakes
- Expecting identical colour on every part.
- Using one photo for approval.
- Ignoring purge waste.
- Mixing spools.
- Changing geometry after approval.
Buyer checklist
- Is the transition length known?
- Are objects grouped logically?
- Was the final geometry tested?
- Is a reference sample kept?
- Is the lighting controlled?
Tell us the model and desired gradient through our contact form.