This article will guide you through the process of setting restrictions on Items, Researching, Blueprints or Crafting.
This is a pretty straight forward process so I will keep it simple and copy the help comments from the file here:
"Item names should be placed directly under the category you want it restricted under. In order to restrict crafting for an item, simply place it below the [Crafting Restrictions] section. Be aware that item names are case-sensitive and must be spelled correctly in order to properly apply the restriction."
Item - Restricts an item
Blueprints - Restricts Blueprints of a certain item
Crafting - Restricts crafting of a certain item
Research - Restricts researching of a certain item
This is the main file that controls restrictions and is found in the Essentials folder in your admin console. Simply place the name of the item you want restricted under the correct category, see pic
Please note it is important that you enter the correct spelling and wording on the item you are adding otherwise it will not work
When finished save the Controller.ini file