Blueprints

Blueprints can be obtained from Flotsam or from Treasure. Item Rarity of blueprints roughly corresponds to the rarity of the flotsam or treasure. It may vary +/-1 rarity level.

Use

Blueprints can all craft a specific object, when placed in the correct crafting location (e.g. Smithy). They offer a limited number of craftings, listed in the center right of the blueprint icon on the inventory screen. They do not allow crafting without the appropriate skill for that type of item. If you need Secrets of Wood to make Wood Walls, a blueprint does not overcome that requirement.

Item quality of Common usually only has small buffs, like 2% more HP for building components, or slightly more armor or thermal resistance for clothes. And these all require the same or slightly more resources as the base item players can craft.

Item quality above Common is more difficult to create, requiring both more resources in quality, but also variety in what you use. For instance, in this example, the player must use two different forms of each resource. (2 x 10) thatch, means two types of thatch, both of which you will spend 10 of to craft this blueprint. Here you can see that this player has two types of fiber, but only one type each of the other resources to craft this blueprint. Further, this blueprint can still be used 82 times and produces a Stone Floor that has 9.282% more durability (hit points).

Not every region has two types of wood or thatch or stone or metal so you can see that travel to other regions or trade will be needed in order to craft higher quality gear.

Note: While blueprints of higher qualities will require multiple types of resources, once crafted, they can be repaired with a single type/generic resources.

Further Information

Crafting Bonus, Intelligence and Upgrade.

Parameters altered by Blueprints

As of Patch 18.84

General

• Crafts Remaining
• Max Upgrades
• Durability
• Crafting costs

Armor

• Armor Value
• Hypothermic Insulation
• Hyperthermic Insulation
• Stamina
• Health
• Intelligence
• Melee Damage Multiplier
• Torpidity
• Oxygen
• Fortitude
• Weight

Tools

• Weapon Damage

Weapons, Siege Weapons, Cannons, Defensiv Weapons

• Weapon Damage

Sails

Weight Sails

• Sail Max Movement Weight

Handling Sails

• Sail Acelleration
• Sail Effective Angle

Speed Sails

• Sail Max Velocity
• Sail Turning Effectiveness

Fishing Rod

• Effectiveness

Others

• No additional Parameters

Range of Parameter by Rarity

Here some Pictures of Blunderbuss Blueprints, with variance in crafting cost.