Recently I have used my Wicked Edge Micro Fine ceramic stones (1.4/0.6 micron) quite a lot. Initially I thought they were both finer than the Wicked Edge Super Fine ceramic stones (1200/1600 grit), but I now think this is not the case.
I took some microscope pictures again and this time the lighting was a bit better.
Here is a picture of an edge after the 1.4 micron ceramic stones.
And here is a picture of the same edge after the 1200 grit stones.
I am not certain, but it looks as if the 1.4 micron stones leave slightly larger scratches than the 1200 grit stones. I am quite certain, however, that the scratches left by the 1.4 micron stones are larger than those produced by the 1600 grit stones.
And, although the lighting in the next picture doesn’t help in determining this, the scratches left by the 0.6 micron stones seem the smallest.
So my current preferred progression is 1.4 micron stones, 1200 grit stones, 1600 grit stones, 0.6 micron stones.
Comparison to Shapton stones
The 0.6 micron ceramic stones are fine. Micro-fine. I wanted to know whether the 0.6 micron stones are about as fine as the 30K Shapton stones, which have a particle size of 0.49 micron.
So I took a picture of the knife edge after the 30K Shaptons: a very smooth edge.
In the same lighting conditions I took a picture of the edge after the 0.6 micron ceramics as well.
The 0.6 micron ceramics seem quite a bit coarser than the 30K Shaptons.