What capability derived from the ballpoint's reliance on mechanical action and thicker ink makes it viable for specialized paperwork?

Answer

Creating impressions through multiple sheets of paper for triplicate forms.

The combination of rolling action and viscous ink allows the ballpoint to exert enough force to create impressions through several sheets, which liquid ink systems struggle to replicate consistently.

What capability derived from the ballpoint's reliance on mechanical action and thicker ink makes it viable for specialized paperwork?

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