HTML, CSS: How to reduce the thickness of table borders when printing?

Good afternoon.

Make a web report as a table. But faced with the problem of the thickness of table borders: it's too thick.
I tried to set thickness: 1px, .25pt, .1mm (and others) - there is no difference: thinner than a certain value becomes. Tried in Chromium and FF - no difference.

Just in case I tried to print on the same printer from the same machine table from Calc-a (LibraOffice) - the border turned out fine as I wanted.

For comparison:
to the left is a printout from the browser (the resulting minimum), to the right of the calc:
0105fb4d42324b8fb0b3ea2c3322def9.jpg
The only work the way I managed to get a thin frame is to increase all the font three times and set the page style transform: scale(.33). The way I do not like, I would like a more elegant solution.
Very hope for your help.
July 9th 19 at 13:54
1 answer
July 9th 19 at 13:56
em and % tried?
Yes. The result is the same: less than a defined value not "purifies". - Eryn commented on July 9th 19 at 13:59

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