The Alchemy Bag is very much like a portable Alchemical Chest that can be carried around in the inventory. All inventories are tied to the player.


Alchemy Bag Inventory

The Alchemy Bag, like the Alchemical Chest, has 104 item slots. 

Multiple bags can be held in a player's inventory at the same time. If they are the same color, they will always open to the same inventory. Using different colored bags allows for unique inventories linked to their color. You can also put an alchemy bag inside another one of a different color for another separate inventory. For example, you could put an orange alchemy bag inside a white one, take the orange one out, and access the orange bag's inventory.

As you can see in the picture to the right you can have 16 different colors from light purple to red.

Usage With EE Power Items

There are a number of special items in the Equivalent Exchange mod that can be used while inside an Alchemy Bag. Once placed inside the bag, they will automatically turn on.

Black Hole Band

Pulls all items within 7 blocks into the bag.

Gem of Eternal Density  

Condenses items inside the bag to higher level items.

Note: If you do not want to have the items you mine condensed then do not use this. e.g. If you are looking for emeralds and you find tungsten first, when the emeralds go into the bag they will be turned into tungsten.

Talisman of Repair

Repairs all items in the bag at a rate of one damage point per second.

An effective way of using this is by having two sets of tools with you one set in the bag and one set in your hotbar. When the ones in your hotbar deteriorate swap them over with the ones in your bag. Whilst using the undamaged ones the damaged ones are being repaired.

Void Ring

Combines the effects of the Black Hole band and the Gem of Eternal Density.

Alchemy Bag v.s. Ender Pouch

See Ender Pouch


High Covalence



High Covalence

Alchemical Chest


High Covalence



Alchemy Bag


Placing an Alchemy Bag within itself will result in losing the bag, the items inside won't be lost. To recover the bag you must either make a new one, dye an Alchemy Bag to the same color then withdraw it and revert the color to the one you had before or you can borrow someone's Alchemy Bag in SMP.

Never, never do it. Only do it if you want to lose EMC to make a new one.

As a Crafting Material

Alchemy Bag


Alchemy Bag

This recipe is technically more efficient, as it only uses one piece of dye.

Video Tutorial

TGP_Tekkit_-_Episode_3_-_More_Bag_Space Minecraft_Technic_Part_29_The_Gem_of_Eternal_Density,_Blackhole_Ring_and_the_Alchemy_Bag! Technic_Tutorials_46._Alchemy_Bag


  • When used with a Black Hole Band, it will still pull in items when full. Those items will then just disappear.
  • Also, when combined with a Black Hole Band, there is a bug that sometimes duplicates the items that get pulled in. So it might occur that you gain double the amount of items. (Fixed in 3.1.2)
  • It is possible to place an Alchemy Bag within itself, resulting in an inability to access the items until you have created another one.
  • Sometimes when lag on a multiplayer server happens all the items disappear
  • The items inside the Alchemy Bag may go back to a previous save in the event that Tekkit quits unexpectedly, which could be good or bad.
  • The bugs with disappearing items may be due to Minecraft/Tekkit behavior where the player data is saved alternating as player and his name. Renaming the directory on the server may restore items.
  • On some SMP servers there's a chance that the alchemy bag will vanish after a crash/relog


If you want to make a colored bag, it is more efficient to make a white one, then put it in the crafting grid with the dye. This only saves a small bit of EMC, but is smart if you are scarce of a dye and do not have an Energy Condenser.

If you have enough resources, it can be smart to make 2 of each one you use, so that you can get to what you have in it if you accidentally put the bag inside itself while moving things from your inventory to the bag.

A practical use for this bag is storing items, as they will be safe if you die. Many people will put tools into the bag to avoid making a long journey back to their base.

If you play online then switch to offline, your inventories will disappear.  (or vice versa)  check this post originally from JonJon1234 disappearing inventories

It's the way Alchemy bag inventories are handled, to make it SMP compatible.
It's the same in the Server, I have files called "bag_jonjon1234" "bag_piesofthesky" etc.
If I was to join a server, once in "offline" player (Steve skin, name being "Player") it would save the inventory and bag under "Player", however, then joining as "Jonjon1234" would think I was a new player, giving me new bags and a new inventory... It's just the way the bags and players are handled. It's the same as Vanilla.
About EnderPouches. They are linked via colours.
Temperary solution is to go into your saves folder -> world -> data -> bag_player to bag_NAME or to bag_NAME to bag_PLAYER. This would save the bag's inventory for both players. Apart from that, not much can be done.
EDIT: Or copy then rename...

jonjon1234, Nov 19, 2012

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