1981-2019 Cibachrome/Ilfochrome prints 10"x8" up to 20"x20" (edition 1 of 1),Wet Plate Collodion glass plates 4"x4" up to 4.25"x5.5" (edition 1 of 1) Limited edition salt prints, silver gelatin prints, All are available as limited edition large format archival inkjet prints up to about 60"x40" Photograms of ferns were among the earliest images made at the beginning of photography. These photograms are made either onto collodion wet-plate glass plates or Cibachrome/Ilfochrome color photographic paper. Mine date from the early 2000's, not the 1830's!