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The Optimised hide tanner is a machine that can be built in the Invention Guild basement at level 111 Invention. It is an upgraded version of the Automatic hide tanner. It automatically converts hides into leather, even while the player is offline. The optimised hide tanner does not incur the normal coin/rune cost for converting hides into leather.

Every hour, on the hour, the optimised hide tanner will process up to 140 items deposited in it, consuming up to 840 machine charge. Building it requires 50 of the power allotment supplied by the generator. It can hold up to 30,000 items over the three input slots.

Once the optimised hide tanner has processed some hides, the resulting leathers may be withdrawn via the machine management interface.

Optimised hide tanner (icon) Optimised hide tanner
Invention-Make-X GE icon
6,800 XP--
Invention Invention level111
Blueprint (Invention) Discover: Optimised hide tanner
Power (icon) Power required: 50
Machine built: Automatic hide tanner
P2P icon Members onlyYes
Protective componentsProtective components10N/A-
Evasive componentsEvasive components10N/A-
Cover partsCover parts100N/A-


The optimised hide tanner processes 140 items per hour at a cost of 840 machine charge. Thus, each item costs 6 machine charge to process - an equivalent of 143.9 coins per item.

The optimised hide tanner processes 3360 items per day at a cost of 20,160 machine charge (approximately 6.7 divine charges). When completely filled, it will take 8 days and 23 hours to process the 30,000 input items, using 180,600 machine charges (approximately 60.2 divine charges).


This table is based on GE prices, profits will be less if these prices cannot be obtained.

Profit via
Daily profit Weekly profit Profit via
Snake hide Snake hide
Snakeskin Snakeskin
-1,963.9 -6,598,798.1 -46,191,586.6 -1,835
Snake hide (swamp) Snake hide (swamp)
Snakeskin Snakeskin
87.1 292,561.9 2,047,933.4 211
Green dragonhide Green dragonhide
Green dragon leather Green dragon leather
-15.9 -53,518.1 -374,626.6 108
Blue dragonhide Blue dragonhide
Blue dragon leather Blue dragon leather
-32.9 -110,638.1 -774,466.6 91
Red dragonhide Red dragonhide
Red dragon leather Red dragon leather
-68.9 -231,598.1 -1,621,186.6 55
Black dragonhide Black dragonhide
Black dragon leather Black dragon leather
30.1 101,041.9 707,293.4 154
Royal dragonhide Royal dragonhide
Royal dragon leather Royal dragon leather
91.1 306,001.9 2,142,013.4 215