---
title: Microbubbling
description: Microbubbles
---

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# Microbubbling

## When people refer to air trapped beneath a vinyl graphic, they often use the general term "bubble." In reality, several different types of bubbles and bubble-like defects can appear throughout the life of a graphic. While many may look similar, their causes, prevention methods, and corrective actions can differ significantly. Understanding these defects allows installers to diagnose problems more accurately, correct them more effectively, and improve long-term graphic performance.

 

**![MicroBubbles-1](https://help.arlon.com/hs-fs/hubfs/MicroBubbles-1.webp?width=670&height=503&name=MicroBubbles-1.webp)Microbubbles**

Microbubbles are clusters of tiny bubbles that often become visible weeks or months after installation. They typically appear in flat areas and are commonly caused by incomplete adhesive contact during installation.

Although the graphic may initially appear smooth, trapped air expands when exposed to heat, revealing the defect.

**Common Causes**

- Insufficient squeegee pressure
- Missed installation areas
- Incomplete adhesive bonding
- Failure to post-heat when required
- Failure to reapply pressure after heating

**Prevention**

- Maintain proper installation temperatures
- Apply consistent squeegee pressure
- Use overlapping squeegee strokes
- Reapply pressure after heating
- Inspect graphics before completion

**Correction**

Minor microbubbles can often be corrected with heat and pressure. More severe cases may require puncturing and air release.

---

**Trapped Air Bubbles**

Trapped air bubbles are the most common type of bubble found in vinyl installations and can appear as small bubbles, large bubbles, or elongated air lines.

**Common Causes**

- Missed squeegee passes
- Insufficient pressure
- Poor overlap between strokes
- Trapped air during installation
- Air-release channels blocked by residual solvents
- Air-release channels collapsed due to excessive heat
- Graphics laminated or installed before complete print outgassing

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