If i'm mixing .512 btc, and i would receive .05 the remaining .012 BTC will be donated?
If you send 0.512 BTC (512 mBTC) to deposit address, you will receive 512 mBTC chip. You can split it into smaller ones and donate as much as you want.
I did. I mean, i commonized into .05 btc then the rest been donated.
We have introduced commonize function which will swap your weird looking 1.024 BTC chip into 1 BTC chip and weird looking 0.512 BTC into 0.5 BTC.
Using this action will cost you the weird part of chip which is around 2% fee.
Then i found in the FAQ.
mjglqw ; Thanks!