There is a known bug when it comes to EMC with this chest. The second recipe listed down below's crafting materials comes out to a total of 13,036 EMC, but the Gold Chest's EMC Value is a total of 18,496. This means that you could condense a Gold Chest into it's base resources and come out with more EMC than you started with, which can be exploited. There's a tutorial with pictures on how to set this up right here. There's also a video in the "Video Tutorial" section of this page with a guide on making an EMC Farm out of this exploit.