What do you use as a PDF generator? In my experience, not all PDF generators are predictable in the way they render CSS. The best I have found is Prince XML, but a commercial server license of $ 3,600, which depending on what you intend to use for it, can be quite expensive.
In any case, itβs pretty easy to adapt an infrastructure like Blueprint to use metric units instead of pixels. The print frames I checked do not seem to provide what the CSS frames do.
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