Question
What is paper opacity?
Answer
Opacity measures how well a sheet blocks light and hides what is printed on the other side. High-opacity paper keeps double-sided pieces clean and readable, while thin, low-opacity stock lets the back image ghost through.
- Why it matters: for anything printed on both sides, opacity prevents distracting show-through.
- What raises it: heavier weight, fillers, and brightness treatments all increase opacity.
- Trade-off: very thin, economical stocks show more of the reverse side, so plan double-sided layouts with opacity in mind.
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