Patent Leather ★★★

Nothing in this list is craftable in turn, so one Patent Leather is a single step: 5 units of material drawn from 3 base items, plus 5 crystals.

That bill outweighs 4,201 of the 13,602 recipes tracked here and 489 of the 1,844 Leatherworker ones, and 9,374 recipes nest deeper.

1 of the 3 raw materials come out of the ground, and one of them is time-gated: Shroud Tea Leaves (2:00). That window comes round once per Eorzean day, every 70 real-world minutes.

Nothing in the data consumes Patent Leather: it is one of 147 end products among the 160 Leatherworker recipes at Lv 50.