It will let you use any dye, whereas it should require an ink sac (dye:0). My actual usage was for thermal foundation alloying (copper + tin = bronze, etc). Since all thermal foundation ingots are the same item with different meta, it ends up creating quite a mess.
Notably, the JEI recipes display correctly, despite this behavior.
Eg. if you create the following recipe...
mods.rockycore.Anvil.addRecipe(, , , 1);
It will let you use any dye, whereas it should require an ink sac (dye:0). My actual usage was for thermal foundation alloying (copper + tin = bronze, etc). Since all thermal foundation ingots are the same item with different meta, it ends up creating quite a mess.
Notably, the JEI recipes display correctly, despite this behavior.