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Corona vs Flame Treatment: What's the Actual Difference?

It's 2026 and industry still uses open flame for surface treatment of plastics. A viewer wrote in asking why — and specifically, what's the actual difference between corona (plasma) treatment and flame? The answer is more interesting than "one is better." Let me walk you through it.

⏱️ Chapters

00:00 It's 2026 and industry still uses fire

00:11 The viewer's question: what's the difference between flame and plasma?

00:17 Quick intro — Greg Friedman, plasma bioengineer

00:29 Corona treatment in the plastics and printing industry

00:39 What surfaces get treated: polyethylene, polypropylene, PTFE…

The skinny

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