Thallasium Helmet is a item from Unknown Mod, crafted from Thallasium Forged Plate.
Crafting using Thallasium Forged Plate, Thallasium Forged Plate, Thallasium Forged Plate, Thallasium Forged Plate and Thallasium Forged Plate, arranged in the pattern shown. Produces Thallasium Helmet.
Crafting 
Thallasium Helmet guaranteed
betterend:thallasium_helmetbetterendunknownRecipe JSON (1):
{
"recipe_type": "minecraft:crafting_shaped",
"pattern": [
"###",
"# #"
],
"ingredients": {
"#": {
"item": "betterend:thallasium_forged_plate"
}
},
"conditions": [],
"sequence": null,
"group_name": "end_metal_helmets",
"experience": null,
"cooking_time": null
}