Tiny black dots in printed scanned documents

Hi everybody,

I am very new to advanced settings while printing / scanning documents.

I found my grand grandfather birthcertificate and I would like to print a copy of it to put on my desk while keeping the original safe.

The problem is that no matter how much I set the quality to high, there are tiny dots that appear on the printed document that messes up the layout.

How do I make them disappear or at least be less obvious ?

I tried google searches but nothing seems to work ( gaussian...

Tiny black dots in printed scanned documents