Best to also use a very diluted developer so it comes up a bit more gradually.
Many years ago, I was in an advert for a client on teacher training. (OK my hand was!) It actually was processed for real with under red light on a film set, though was shot on top range equipment. Here's my three seconds of fame. Only time I've not worn rubber gloves in the darkroom! Was fun to see it in the cinema before the main feature!