A laminator is a machine that seals paper or other flat materials between two layers of clear plastic film, creating a smooth, protective coating. When you laminate something, you're preserving it so it won't tear, get wet, or fade over time.

Teachers use laminators constantly: to protect classroom posters, make durable flashcards, or create reusable worksheets that students can write on with dry-erase markers. Libraries laminate bookmarks and library cards. Restaurants laminate their menus so they can wipe off spills. Museums laminate informational cards that thousands of visitors will handle.

The laminating process works by heating the plastic film until it melts slightly, then pressing it tightly against both sides of whatever you're protecting. Once it cools, you have a sealed, water-resistant document that's much tougher than regular paper.

You might laminate your favorite drawing, a special certificate, or important reference materials you'll use repeatedly. Some people laminate emergency contact information to keep in their wallets. The clear plastic coating means you can still see everything perfectly while keeping it safe from coffee spills, rain, or just the wear and tear of being handled hundreds of times.