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	Podcast:		BrainStuff
	Episode:		What exactly is a blueprint?
	Category:		Science & Medicine
	Duration:		00:03:18
	Publish Date:		2013-07-12 19:41:25
	Description:		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. Learn more about your ad-choices at https://www.iheartpodcastnetwork.com See omnystudio.com/listener for privacy information.
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