So i am trying to edit an icon pack that has an index lock on it.

I know to unlock it you go to image > mode > rgb color.

However doing this drastically reduces the image quality.

>![Below is the original still with the index layer:][1]

[1]: https://i.sstatic.net/Hc20U.png

Apologies the icon above is white (on a white background)!

![Here it is unlocked and edited with loss of quality :][2]

[2]: https://i.sstatic.net/C9dzr.png

The original is a .PNG and the saved edited version is a PNG.

The original file is only 1kb not that I'd think that would make any difference. But when I save it there seems to be some little specks that appear eg the very top line on the left it seems to protude. And the bottom right inside there is a dot of white.

All I've done is unlocked the index and re-saved and it just seems to deteriate in quality.

Any help appreciated.