Product label style change

Hello there,
wanted to ask if there is a way to either change the product label style to be bold? I don’t know why, but when I make a proposal it takes the entry from the label in the “llx_product” table and not the description entry.
Or do I have to use custom pdf template to make it use the the description entry?
Hope you can help me and if clearification is needed, just ask and I try to describe it better.

Kind regards,
RPBTworker