For example:
{
mod: 'tconstruct',
output: 'tconstruct:seared_brick',
type: 'minecraft:smelting',
type: 'minecraft:blasting'
},
{
mod: 'tconstruct',
output: 'tconstruct:scorched_brick',
type: 'minecraft:smelting',
type: 'minecraft:blasting'
}
As for the solution, I had to remove the two type: filters to get it working... There no errors were reported in logs