ps-bold-faces is a variable defined in `ps-print.el'.
Its value is
(cperl-array-face cperl-hash-face)
Original value was
Documentation:
A list of the (non-bold) faces that should be printed in bold font.
This applies to generating PostScript.
You can customize this variable.
This variable was introduced, or its default value was changed, in
version 20 of Emacs.