Sheets and Thermoforming
Sheet products show color and surface defects quickly, so testing on the actual material matters.
Application context
Unstable appearance or whiteness in sheets and thermoforming?
What happens in this process?
Sheet is a flat, large-area product, so any yellowing, whiteness variation, or moisture spots show quickly across the wide surface and become clearer once the sheet is thermoformed. Because the area is large, even a small defect stays noticeable.
Common production issues
Relevant products
How do you select the first product to trial?
Yellowish white → optical brightener (OB); weak white coverage → white masterbatch; moisture spots → desiccant. Selection depends on sheet thickness and material — test a sample under the same operating conditions.
Test a sample on your material. Then decide.
Tell us the problem and application so we can suggest a product to trial.