{
  "Messages": {
    "BlockedItem": "{0} has already been blocked!",
    "BlockSucces": "{0} has been blocked from crafting.",
    "CraftBlockedItem": "{0} is blocked and can not be crafted!",
    "CurrentCraftingRate": "The crafting rate is set to {0}%.",
    "InvalidItem": "{0} is not a valid item. Please use the name of the item as it appears in the item list. Ex: Camp Fire",
    "ModifyCraftingRate": "The crafting rate is now set to {0}%.",
    "ModifyCraftingRateError": "The new crafting rate must be a number. 0 is instant craft, 100 is normal and 200 is double!",
    "ModifyCraftingRateItem": "The crafting rate for {0} is now set to {1}%.",
    "NoBlockedItems": "No items have been blocked.",
    "NoItemRate": "You need to specify an item and a new crafting rate for this command.",
    "NoItemSpecified": "You need to specify an item for this command.",
    "NoPermission": "You don't have permission to use this command.",
    "NoSlotsLeft": "You don't have enough slots to craft! Need {0}, have {1}!",
    "RemovedItem": "Removed individual crafting rate for {0}",
    "ShowBlockedItems": "The following items are blocked: ",
    "UnblockItem": "{0} is not blocked!",
    "UnblockSucces": "{0} is no longer blocked from crafting."
  },
  "Options": {
    "AllowCraftingWhenInventoryIsFull": false,
    "BlockedItems": [
      "Supply Signal",
      "Timed Explosive Charge"
    ],
    "CompleteCurrentCraftingOnShutdown": false,
    "CraftingExperienceRate": 100.0,
    "CraftingRate": 100.0,
    "IndividualCraftingRates": {},
    "InstantBulkCraftForAdmins": false,
    "InstantBulkCraftForModerators": false,
    "InstantBulkCraftIfRateIsZeroForPlayers": false,
    "InstantCraftForAdmins": true,
    "InstantCraftForModerators": false,
    "ShowCraftingNotes": true
  },
  "Settings": {
    "ChatPrefix": "Crafting Controller",
    "ChatPrefixColor": "#008000ff"
  }
}​

{
  "Blacklist": [
    "explosive.timed",
    "supply.signal",
    "rocket.launcher",
    "ammo.rocket.basic",
    "ammo.rocket.fire",
    "ammo.rocket.hv",
    "ammo.rifle.explosive"
  ],
  "Default blueprints": [
    "pistol.revolver",
    "pistol.semiauto",
    "pickaxe",
    "hatchet"
  ]
}​

does it want the items names in this spot too?

"Options": {
"AllowCraftingWhenInventoryIsFull": false,
"BlockedItems": [
"Supply Signal",
"Timed Explosive Charge"
],

also, supply signals aren't craftable. https://umod.org/plugins/component-blocker could block supply signals altogether.