Can a notebook pen clip scratch or mark a soft cover?

Risk depends on contact area, spring force, edge geometry, trapped grit, cover material, and movement.

Research boundary: Existing products already solve much of this category. This page documents tradeoffs and an unverified narrow hypothesis.

What to check

Does this match your real setup?

The concept test shows a US$22 two-pack price before asking for a prototype application. No payment or email is collected.

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