← All symptomsSafety stop: Stop the process if there is smoke, an electrical fault, a strong unfamiliar odor, melting, cracked glass, or evidence that the material is not heat-rated. Follow the equipment and blank manufacturer’s safety instructions.
Prioritized checks
Starting order
Confirm or weaken each cause before changing the next variable.
1
Platen or paper edge concentrates pressure
Evidence that supports it
- The mark has a rectangular or paper-edge shape.
Evidence against it
- The mark is random or visible before pressing.
Safe next actions
- Use pressure no higher than the product requires.
- Keep protective paper larger than the heat plate and test approved padding on a spare.
2
Fabric surface is heat-sensitive
Evidence that supports it
- The polyester face becomes shiny or changes texture.
Evidence against it
- A product-specific control at the same setting is unaffected.
Safe next actions
- Use the exact garment setting and approved mat/pad.
- Do not increase temperature to compensate for poor pressure contact.