When ink appears on a Teflon sheet during pressing, it usually indicates residue transfer from previous operations or improper material handling. This can affect print quality and sheet longevity if not addressed. Common causes include leftover ink from prior presses, adhesive buildup, or incorrect pressing techniques. Solutions range from proper cleaning to using dedicated sheets for specific materials.
Key Points Explained:
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Residual Ink Transfer
- Ink from previous pressing cycles can adhere to the adhesive teflon sheet, especially if the sheet wasn’t cleaned thoroughly.
- Example: A second press may pull up leftover ink from a garment or transfer paper.
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Adhesive Buildup
- Adhesives from heat-transfer vinyl (HTV) or other materials can trap ink particles over time.
- Solution: Regularly wipe sheets with a lint-free cloth and isopropyl alcohol to prevent buildup.
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Material Contamination
- Scrap garments or low-quality transfer papers may leave behind ink residues.
- Best Practice: Use a separate sheet for test prints or scrap materials to avoid cross-contamination.
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Pressing Technique Issues
- Excessive pressure or temperature can cause ink to bleed onto the Teflon sheet.
- Tip: Follow manufacturer guidelines for time, temperature, and pressure settings.
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Sheet Degradation
- Worn-out Teflon sheets lose their non-stick properties, making them prone to ink retention.
- Action: Replace sheets when scratches or discoloration become noticeable.
By addressing these factors, you can maintain cleaner sheets and consistent print results—small adjustments that keep production running smoothly.
Summary Table:
| Cause | Solution |
|---|---|
| Residual ink transfer | Clean sheets thoroughly between presses with isopropyl alcohol. |
| Adhesive buildup | Wipe sheets regularly with a lint-free cloth and alcohol. |
| Material contamination | Use dedicated sheets for test prints or scrap materials. |
| Pressing technique issues | Follow manufacturer guidelines for time, temperature, and pressure. |
| Sheet degradation | Replace scratched or discolored sheets promptly. |
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