What exactly is a blueprint?
Épisode 3 min 18s

What exactly is a blueprint?

De BrainStuff iHeartPodcasts
Blueprinting, which has been around since 1842, is a common way to reproduce an architectural drawing. Tune in to learn more about the complex chemical processes that make blueprints blue -- and white -- in this podcast from HowStuffWorks.com.

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