Primary Black Dye Module
The Primary Black Dye Module originally could be found on the Cartel Market, Cartel Packs or Dye Packs. Due to the random nature of Cartel Packs and Dye Packs, there is a low chance of receiving any specific dye from these packs, it is recommended to instead buy the Primary Black Dye Module from the GTN from other players.
When you use the Primary Black Dye Module, it will dye the primary dye section of your armor Black, and will leave the secondary dye section of your armor its original color. You can not combine it with a different secondary dye module.
All dye modules are one-use, so once you've added a Primary Black Dye Module to your armor, you will not be able to remove it and reuse it later.