Found a pack in Manitou - plan to repeat my nature memories series by using Colorado materials. Part of the trick to making them look like "art" is to use less direct sunlight and let the shadows help shape the print.
How to Make Sun Prints from Any Object in Your Home (or Yard)
More Sun Printing Fabric with Dye-na-Flow - Bloom, Bake & CreateBloom, Bake & Create ...achieve the opposite effect by laying the ferns on dyed fabric and spraying with a coarse spray of a bleach/water solution to have colored ferns against a lighter background. Be sure to do this outside, with any breeze blowing away from you and a bucket of plain water nearby to stop the bleach action before it eats holes in the fabric.....vwr