General Contractors - Building Contractors
Residential General Contractors - Home Building - Commercial Buildings
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A blueprint is a type of paper-based reproduction usually of a technical

drawing documenting an architecture or an engineering design. More generally, the term "blueprint" has come to be used to refer to any detailed plan.

A blueprint had several advantages over other types of drawings; the contact printing method allowed an unlimited number of prints to be made without degradation and assured highly accurate dimensions on the copies. The resulting prints were resistant to fading, marking, and alteration. Additionally, the blueprint process was significantly less expensive than a silver-based photographic process.