Redprints are items that can copy the configuration of certain blocks to other blocks of the same type.
When a redprint is used on a configurable block in the world, the block’s configuration is stored on it. It can then be used on other blocks of the same type to apply the stored configuration to them.
When a redprint is held in the player’s offhand, the stored configuration is automatically applied to blocks when they are placed.
A written redprint may be erased by using it while sneaking. When used on a configurable block while sneaking, the redprint is overwritten with the configuration of the block.
All configurable blocks in Thermal Expansion and Thermal Dynamics support redprints.