Gum Bichromate Process 

Thank you for this great video of yours , very interesting and I learn things, so thank you for your work done here, the teaching and informative work.

Wow, Bob. Thanks so much for showing us all of the important details that go into making a gum bichromate duotone print. What a lovely process. I need to figure out some darkroom logistics but I'm definitely giving this a try for my portraits!

thanks so much for this tutorial, Bob. i'm a printmaker, and you've convinced me to dive into photographics in my space. i used to think that i needed a 100% dark room.

Thank you for taking the time to do this Bob.

Thanks Bob. Really enjoyed watching this process.

I'm looking forward to attempting gum bichromate prints this summer. Your channel is a great source of knuckles and know-how techniques. It's appreciated! 😸

Thank you for putting this information out there!

A masterclasss. Thank you for sharing!

This is great info -- thank you! Looking forward to trying this out.

Excellent, thanks for taking the time to make the video and share your knowledge.

really interesting process! Thank you so much for the great information!

so generous and thorough exlanation, thanx!

Thank you so much for these wonderful videos!!! Watched this numerous times over the past year and FINALLY started gum printing, and now am back to see all the wonderful tidbits that were tough to comprehend before actually trying the process. You're amazing!!!

Nice one Bob thank you, great video

Bravo - Love your work!

Fantastic information! Thank you!👍👍👍

Thank you. I will explore this further.

Thank you for the upload and explaining the process.For mixing the liquids you should buy a magnetic mixer.

Nicely Done Bob!

Thank you so much. This was great to see before I get started on my journey. Fe

Thank you Sir. Nice & informative video :)

This is gold.

Great video, thanks! This motivates me to carry on with alternative processes and uploading videos on my RU-vid channel dedicated to film photography!

Great tutorial! Made me think that bichromate is not an impossible process as many led me to believe! By the way - that's not Radiohead, it's Muse lead singer, Matt Bellamy.

Very Informative_Thank You

thank u sir.....

Thank you so much for this video! I've realised so many ways I might be going wrong with the process. Just wondering what the exposure duration is in minutes? (For the proportions you have mentioned) and is it necessary to have a light box with UV lights or is a more basic light box sufficient?

Hi Bob. You mentioned that you make silver gelatin negatives. I´m wondering how you coat it so smoothly in a such a large acetate. I´m asking because I do the same but I lay down the silver gelatin on duralar with a brush and it leaves brush marks. Thanks!!

Thank you for the information. And a magnetic stirrer will help you a lot. They're fairly cheap

Amazing work 🙏 any idea why my prints drive super curved? I did a preshink but I didn't size the paper.

You said you pre-sized the paper. What's your preferred sizing technique? I'm encountering problems clearing the pigment and I think it's my sizing.

I wonder if you can print color separation negatives with three different color dyes????? COLOR!

Great video! Can you comment on how you prepare your pigments? Thanks!

That is so cool. The more modern technologies are also cool but it's too complicated to understand lol

I didn't get if you use a different separation for each layer or you only use the same negative with different concentration/exposure

are you not worried about the dichromate on your hands while developing and coating?

I'm very interested in how you make your negatives, can you give any information Thanks very much

super interesting. Whats the name of the punch system?

Yeah, I'm studying but sidetracked too many times lol

How does one ensure the print dries flatly?