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 rune660
Combo runes
1Nature rune2Astral rune5Lava rune655
1Nature rune2Astral rune5Smoke rune1,000
1Nature rune2Astral rune5Steam rune1,130
1Nature rune2Astral runeTome of fire635
1Nature rune2Astral runeLava battlestaff635
1Nature rune2Astral runeSteam battlestaff635
1Nature rune2Astral runeStaff of fire635
1Nature rune2Astral runeSmoke battlestaff635


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) 149 184 -92 34
Cowhide (Hard Leather) 149 188 -88 36
Green dragonhide 1,431 1,672 114 221
Blue dragonhide 1,773 2,028 128 235
Red dragonhide 2,323 2,617 167 274
Black dragonhide 3,106 3,374 141 248

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