|431,200 per hour|
2,800 x Blue dragon leather (5,401,200)
Blue dragon leather is used to train Crafting, and it is always in high demand. Because blue dragonhide must be tanned into leather before it can be crafted, tanning the hides in bulk can be highly profitable.
Because the price difference between hides and leather can be fairly small, it is important to buy the hides for a low price and sell the leather for a high price; you can lose out on up to 50% of the profit if you are not patient. Test the profit by buying one blue dragonhide and one blue dragon leather. If the difference between the two is less than 200, it may be worth it to switch to green, black or red dragonhide.
To create blue dragon leather, blue dragonhide must be taken to a tanner. Ellis, in Al-Kharid, is the quickest tanner, and there are no requirements to use him. Withdraw 27 blue dragonhides from the bank south of the tanner and 20 coins for each hide you want to tan. Run north into Ellis's building and right-click Trade Ellis. Tan them all, and run back to the bank. Each run takes approximately 25 seconds while running, and 45 seconds while walking. This averages out to about 2,800 hides tanned per hour, yet a player can tan around 2,000 hides every hour without the use of energy or Stamina potions.
It is strongly recommended to check the live prices on the Grand Exchange before making large investments in any method.
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