Vintage Sweden Questions

I'm just starting to consolidate my various collections of Sweden, so it'll be ready when I start working on it seriously. I'm using the latest Facit catalog (Special Classic 2020) and have questions about the 1855 Skilling Banco issues. Here are two examples of the 4sk. The catalog talks about 'dense background' and 'clear print'. I assume those don't describe the prints that are the norm. With these two the left has the dense background and the right the clear print? Or something different? I have lots of examples to compare to each other with the later öre values, but only the two skillings.

The small white lines in the Guilloche are more even and the blue points of blue color are more regular in the clear prints.
In the dense type, the small white lines are thinner and the blue points of color are bigger
and irregular. You will have to identify the paper thickness.1)thin paper below 0.06 mm 2)medium paper 0.06-0.09 mm 3)thick paper exceeds 0.090 mm(end of 1857) approximations..
Different characteristics in the shades of the paper types,but all shades can be found in the same printing;and can merge into each other.
Dense example:


Clear print:

I'll grab my micrometer (hmm, wonder where I left it last) to measure thickness, after soaking hinge remnants. In my examples the one on the left then is dense, the right clear...