Artificial harmonics notation and fp dynamics...

Hi! According to several orchestration books, for example Walters Pistons Orchestration or Samuels Adler The study of Orchestration, the artificial harmonics are always with white note heads... There is a away to do that?
Are you guys hearing the sfp or fp dynamics into playback?
Thank you,
Rubens.
Are you guys hearing the sfp or fp dynamics into playback?
Thank you,
Rubens.