Making the Gumoil Print

Karl Koenig invented the Gumoil alternative process. He uses an enlarged interpositive to create a photographic image. The interpositive is contact printed onto paper hand-coated with a mixture of liquid gum arabic and potassium bichromate. This is exposed to an ultraviolet light source, then developed in water. The resulting image is then coated with oil paint, allowed to "set"; the excess oil paint is rubbed off with paper toweling, then the image is etched in a dilute mixture of water and household bleach. The result is a true photographic image with atmospherics and painterly qualities. Watch this 28 minute movie to see how it is done.
Anthony Mournian
Artist: Karl Koenig
Videographer: Anthony Mournian

[@parth2954]

Thanks sir ,it was so so usefull. Watching from Assam ,India

[@IainHC1]

This has got to be the quickest half hour for a long time!! Brilliant, informative and really enjoyable vid!! Thankyou :-)

[@MisterRaintown]

Thanks a lot for showing us this! I really like it and appreciate the video!

[@dorothynelson5211]

Wonderful presentation of this photographic process! Thank you for this education.

[@NashvilleClay]

Fantastic demonstration

[@nunyabeeswax7111]

thank you for sharing this! what an amazing video!

[@giulias.5104]

Thank you very much, Sir. Great video

[@TERRYBIGGENDEN]

Thanks for making this clip. It was so helpful, and you have a wonderful measured way of communicating what you do and why. Best wishes. :-)

[@bartolomeperezlopez4122]

Thanks a lot Sir.

[@erikwinkler]

I really enjoyed watching your video.

[@conradsyiem]

Its beautiful!

[@ammartaibi2623]

Thank you for the information. I strongly think you should wear gloves when handling dichromate. And a gas mask when mixing it from powder or at least do it outside. It's very harmful

[@patriciosaavedra2840]

congrats, amazing and beauty work, where did you print such a big negative?

[@TheLex1972]

Thank you for the amazingly clear explanation of this interesting process, a process which was quite opaque to me when I only read about it.

[@juliavanschalkwyk9321]

Wonderful tutor. One of the best. Can anyone tell me if he uses printers oil or ordinary oil paint?

[@shajinjaleelartist]

GOOG JOB

[@AnthonyMournian]

Alan, if you miss the darkroom, consider taking a workshop with the Photographer's Formulary in Condon, Montana. Dan and Jill Burkholder have workshops there the same week this year. Go to workshopsinmt[dot]com/Burkhldr-PT-PD--July.html to see the workshop description. Good luck and welcome back to the darkroom! Anthony Mournian

[@Bobbied100]

Wonderful. Where in New Mexico did you record this?

[@alevz]

Where can i find such exposure unit

[@_oe_o_e_]

could the oil be mixed with linseed oil or turpenoid?

[@_H_2023]

Regarding your Potassium Dichromate solution , what is the percentage you have mixed to? is it 5% or more?

[@RogersPhotographyGuilford]

1:55 I had to laugh because I've never ever heard liquid measured in inches. Also did you meant potassium dichromate instead of potassium bichromate? It sounds like you're saying bichromate which I'm not familiar with. I'm getting back into printing after a very, very long (decades) hiatus from wet work and need a few "refreshers". It's 9 years later but still relevant.Thanks for sharing this.

[@abhisheks3703]

Do we need to size the paper?

[@victorobeid1982]

What kind of bleach? Please can you help!

[@joehsu6975]

I'm here to hit the subscribe to 1K lol, btw love the technic tho

[@silekiernanphotography]

How much water?

[@dahanifah]

What type of paper you use for this print?

[@zianyag]

Darmansyah Abu Hanifah Watercolor paper

[@csafdari]

Please don't expose yourself to dichromates, use gloves