Yellowing and dull white plastic
Yellowing or dull whiteness affects product appearance even when production keeps running.
What do you see on the product?
- Unclean white tone
- Variation across close production runs
- Dull final appearance
Candidate to trial: Optical Brightener (OB)
The issue as it appears on the line
White plastic coming out dull or yellowish?
Diagnostic guidance
- Likely cause
- Possible causes include material, process heat, base color, or unsuitable grade selection.
- Impact on production
- The defect can cause extra sorting or rejection by appearance-sensitive customers.
Suggested product to trial
Optical Brightener (OB)
SPHERE Optical Brightener (OB) reduces the yellow tint and gives a brighter, cleaner white. Available in two loadings (10% and 15%) depending on the yellowing level and application.
Practical benefits
- Improved perceived whiteness
- More stable appearance with the right selection
Relevant applications
Related products
Frequently asked questions
Is the same solution right for every production line?
No. Selection changes by material, application, product form, and process. We start with the problem, then suggest a sample.
Should we test before a larger order?
Yes. Result depends on material and application, so sampling is the decision point.
Test a sample on your material. Then decide.
Tell us the problem and application so we can suggest a product to trial.