First print with FTD deep black
FTD deep black is the thing! The print was not entirely succesfull because I did not place enough supports. That's why the print was squashed. As a problem, the slices are not displayed in the right position. I mean the object was placed in CW in the middle of the print area and when I started printing, the slides were in bottom right position, part of the slides being even outside the print area. But over all, I am really pleased for the first print.
It is an open source ring from thingyverse.