One technical question about DarkSend.

Let's say that I have 110 DRK in one address and I want to pay 30 DRK to another user using DarkSend.

DarkSend does something called "denomination". What does this mean? That it will send first 100 DRK to another address and then include these 100 DRK in DarkSend pool from this address?

Is this just this one transaction (in this example) or maybe denomination does also something else so that the original address (with 110 DRK at the beginning) is somehow obfuscated?

Thanks.