---
type: faq
title: "What is paper opacity?"
description: "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"
resource: https://www.4over4.com/faqs/paper-stock/what-is-paper-opacity
tags: ["Printing Terms Glossary", "faq"]
timestamp: 2026-07-20T18:54:40.856Z
---

# What is paper opacity?

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

Part of the **Printing Terms Glossary** hub. See [all faq concepts](index.md).

- Page type: faq
- Hub: Printing Terms Glossary
- URL: https://www.4over4.com/faqs/paper-stock/what-is-paper-opacity