A blueprint is an item you need so you can learn how to craft a specific item, tool, weapon or even weapon attachment. Blueprints can be found when killing red/irradiated animals, can be researched with a research kit and can be looted in crates around the map. To learn how to craft the item on the blueprint, you must first study it.
With a Blueprint you can learn how to craft the following items:
|Large Wood Storage|
|Kevlar armor pieces|
|Bolt Action Rifle|