Tan Leather is a Lunar spell which tans up to 5 hides in the player's inventory, with no extra gp cost like there would be with the normal process of tanning. However, in order to cast the spell, the player must have completed all of the easy, medium, and hard tasks of the Fremennik Diary.

With good timing, this spell tans around 8000 hides per hour, giving the player ~130K Magic experience per hour and can be used as a good method of money making.

As cowhide can be tanned into either soft leather or hard leather, it is possible to toggle between the two by right-clicking the spell icon.


Spell cost
5Fire rune1Nature rune2Astral rune747
Combo runes
1Nature rune2Astral rune5Lava rune742
1Nature rune2Astral rune5Smoke rune1,052
1Nature rune2Astral rune5Steam rune1,187
1Nature rune2Astral runeTome of fire722
1Nature rune2Astral runeLava battlestaff722
1Nature rune2Astral runeSteam battlestaff722
1Nature rune2Astral runeStaff of fire722
1Nature rune2Astral runeSmoke battlestaff722


The formula below, assumes you will be tanning 5 hides per spell, buying the dragonhides, nature rune, the astrals and will be casting the spell with a smoke/lava/fire/steam staff, or Tome of Fire

Hide Hide cost Leather price Profit/Loss per hide Tanner profit
Cowhide (Leather) 118 150 -112.4 31
Cowhide (Hard Leather) 118 146 -116.4 25
Green dragonhide 1,481 1,680 54.6 179
Blue dragonhide 1,881 2,086 60.6 185
Red dragonhide 2,426 2,636 65.6 190
Black dragonhide 3,086 3,326 95.6 220

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