|Nationality or Tribal Affiliation||American|
|Type of Object||Print, Photographic|
|Date||2007 or prior|
|Medium||Gum bichromate print|
|Dimensions||H-17.3 W-12.3 cm|
|Collection||Missoula Art Museum Collection|
|How acquired||Gift, Susan and Roy O'Connor|
|Statement about this object||
Howell made this contemporary print using the gum bichromate process, a photographic technique introduced commercially in 1894 and widely used for its painterly qualities, but rarely seen today. She made her photo using a negative of a historic portrait of a family member.
The bichromate process uses a bichromate compound, in this case gum arabic, as the binder and water-based pigment as the final image material. Though the expression "dichromate" is now preferred in chemistry, "bichromate" remains common usage in photography.
When exposed to light, the gum arabic hardens in relation to the exposure; unhardened areas are washed away to reveal the paper support, forming the highlights and midtones.