Duplicate your layer, put the one on top in Grain Merge mode.
May be you can duplicate one more time and put the later in Burn mode if you want a thicker font
But in the end your sample image is way too small to do any proper try, I mean we don't really see what the result on this tiny thing you gave us, if something seems to work on 1 square millimeter, it might/will not work on an A4 full page...
May be you can duplicate one more time and put the later in Burn mode if you want a thicker font
But in the end your sample image is way too small to do any proper try, I mean we don't really see what the result on this tiny thing you gave us, if something seems to work on 1 square millimeter, it might/will not work on an A4 full page...