Blueprints

Blueprints.

Manufacturing plans for a weapon, drug or armor.

Obtaining Blueprints

• You can occasionally find lockers in random encounters on city ruins terrain, some of which can be trapped. Opening these usually requires a high lockpick skill and may contain items ranging from a worthless Junk to Blueprints. Some of them cannot be picked.
• There are Quests that may give Blueprints as reward for your efforts.
• Trade with other players.
• Consult the Blueprint Hunting FAQ for more info about hunting blueprints in the wild.

Uses

Blueprints are required to craft most higher-tier equipment. Consuming them will permanently add those items to your Fix-Boy, provided you have the second level of the required Professions.

For a list of items requiring blueprints, see here.