"Tri-Color Gum: Beautifully Handmade" with Thomas Callahan
July 31 - August 5, 2022
Registration Deadline: June 31, 2022

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Workshop Fee:
(does not include food & lodging)

Save up to 25% off tuition with a combination of any 2 of the following discounts:

Early Bird Discount: 
An early registration by 
MAY 15, 2022
 Qualifies for a 10% discount on your workshop tuition.

Back to Back Discount:
Register and attend two classes consecutively and receive one night of your B&B stay FREE! Also receive a 10% discount off the second weeks tuition

Bring a Friend Discount: 
15% off available when you both sign up for the same workshop.

When it comes to unique color prints, you can't get much more creative than gum bichromate. Tricolor gum bichromate is a 19th century process consisting of watercolor pigments mixed with light-sensitive dichromate built up in layers to produce a full color image. The process allows for extreme control over your print; whether you want to recreate natural colors flawlessly or embrace beautiful imperfections, with gum printing you will end up with a distinctive handmade print completely your own.

Students will learn the basics of UV-printing from digital negatives. Prior experience with digital negatives is not a requirement but will aid the learning process. Students should bring a laptop with Photoshop installed and many full-color images to make digital negatives from. Students will learn how to mix pigments and prepare their paper, what combinations of pigments work well, how to troubleshoot color and contrast issues, how to print gum over cyanotype, and the best techniques for coating, developing, and drying.


Thomas Callahan is a photographer with a focus on experimental processes and the American vernacular. He resides in Montana where he graduated from Montana State University Bozeman with a BFA in Integrated Lens-Based Media. During his years of study, he practiced cyanotype, gum bichromate, platinum printing, and other alternative processes under the instruction of Christina Z. Anderson. Callahan has exhibited his photography and video works regionally.

Visit his website at thomascallahanphoto.com 
Workshops in Montana
7079 Hwy 83 Condon MT 59826  
Call to inquire about your event - (800) 922-5255  
or email: formulary@blackfoot.net add text.