Forging
In order to turn ore into bars you need to put them in the forge. Better ores require more time to smelt and use more ores to produce each bar. You can also add barrels to speed up or otherwise enhance the smelting.
You can upgrade the forge as well in the upgrade tab. Upgrades include:
| Upgrade | Bonus | Max Bonus |
|---|---|---|
| New Forge Slot | Opens +1 slot to smelt ores in per level | 16 Available Slots (Lv. 16) |
| Ore Capacity Boost | Increases max ores per slot by 10 * (2 + level) per level | 13270 Max Ore Capacity (Lv. 50) |
| Forge Speed | Ores are turned into bars +5% faster per level | +550% Forge Speed (Lv. 90) |
| Forge EXP Gain | +1% bonus EXP gain from using the forge per level (doesn't do anything atm) |
85% Forge EXP Gain (Lv. 85) |
| Bar Bonanza | +1% chance to make an extra bar per level | +75% Chance for Multi Bars (Lv. 75) |
| Puff Puff Go | +1% chance for a card drop while afk (forge card chance, which are not from afk) |
120% Card Drop Chance (Lv. 60) |
Forge slots can also be upgraded in the Gem Shop via the Brimstone Forge Slot upgrade, which grants 50% faster smelting and 50% multi-bar for a slot.
Forge Times
Ores take time to turn into bars in the forge. The duration can be reduced via the aforementioned forge upgrades, using certain Oil Barrels, as well as with the Archer talent 
Smeltin' Erryday, which grants a chance at instant forge progress on each kill (AFK or active, including Multikill).
| Ore | Time | Bar |
|---|---|---|
 Copper Ore x2 |
100 Seconds (1m 40s) |  Copper Bar
|
 Iron Ore x4 |
400 Seconds (6m 40s) |  Iron Bar
|
 Gold Ore x7 |
1000 Seconds (16m 40s) |  Gold Bar
|
 Platinum Ore x16 |
2200 Seconds (36m 40s) |  Platinum Bar
|
 Dementia Ore x40 |
3500 Seconds (58m 20s) |  Dementia Bar
|
 Void Ore x100 |
6000 Seconds (1h 40m) |  Void Bar
|
 Lustre Ore x250 |
12500 Seconds (3h 28m 20s) |  Lustre Bar
|
 Starfire Ore x500 |
25000 Seconds (6h 56m 40s) |  Starfire Bar
|
Forge Cards
Occasionally when removing finished bars from the forge, one or more cards will drop. The first tab of the forge (first four slots) drops 
Fire Forge Cards, while the second drops 
Cinder Forge Cards. The last two tabs do not drop cards. The type of bar smelted doesn't matter.
Oil
Oil may be added to a forge slot to boost Forging Speed or Extra Bar Chance:
| Oil | Boost | Consumption Chance |
|---|---|---|
 Crude Oil |
Forging Speed +15% | 75% |
 Eco Friendly Oil |
Forging Speed +10% | 30% |
 Radioactive Waste |
Forging Speed +30% | 30% |
 Glumlee's Special Tutorial Oil |
Forging Speed +999% | 200% |
 Toxic Sludge |
Extra Bar Chance +20% | 60% |
