Recently, during customer transfer sampling tests, we noticed a common issue with thick-plate transfer logos: after heat pressing, some prints show a raised center with collapsed edges, and the sharp outline gradually turns into an oval, dome-like profile ("bun edge"). This reduces the 3D effect and makes the edge look less crisp.
To solve this, XG's technical team has completed a targeted optimization and now releases an updated formula + process recommendation to help customers maintain sharp, square edges while improving anti-flow, anti-collapse performance, and release stability.
Issue Overview: Why does it "collapse into an oval
Thick-plate transfer requires stronger "standing power." When the silicone system has too much leveling/flow-back, or the shape is not locked fast enough, the thicker and larger the area, the easier it is for the edges to slump-turning the top surface from flat to rounded and making the outline look oval.
Upgrade Focus: Sharper square edges + safer release window
If you are using the common blend 80% square-corner silicone + 20% round-corner silicone and see edge slumping, we recommend a "corner-strengthening" adjustment:
✅ Recommended Ratio (priority for anti-collapse)
90% square-corner silicone + 10% round-corner silicone
This boosts edge support, reduces flow-back collapse, and still keeps enough flexibility for easier release.
✅ Recommended Process (faster shape-locking)
Build thickness with 2–3 thin layers, and do a short flash cure between layers
Each layer "stands" first, so the final thick plate keeps a cleaner square outline.
✅ Heat Press Tips (avoid hot-state flattening)
First, reduce pressure by one level; if needed, slightly lower temperature or shorten time
This helps prevent edge rounding caused by softening under heat and pressure.
Typical Applications
Thick-plate transfer logos / letters / patches
When you want sharp square edges + strong 3D height
When you need more stable release and fewer edge defects in production