preparing for Fibre Fling 3

I'm working on making some smaller sized silk scarves in various colours for Fibre Fling 3.  I have lots of the larger sized ones.  They will be hanging on a clothing rack on hangers at the show.  Large ones will cost $55 and small sized ones will cost $35.  Here's a photo with an assortment of colours of scarves hanging on the rack.

So far I haven't had any satisfying reds.  I get deep purple colours but not red.  I'm trying to stick to materials that I can readily find.  There are natural materials available to buy but so far I've resisted.