The basic written steps for this process can be found over on my Patreon (accessible to everyone):

This is an incredible amount of work, thank you for putting together this research! It's really a shame that projecting film is a very small niche of the already niche film photography community. I feel like all reversal films (or in this case negative films made into reversal films) are their best when projected onto a nice big surface.

As always, bravo for another thoroughly researched, easy to understand, and well-produced video! Back in the 1990s when I making 16mm B/W reversal films, processing everything myself (using battery acid and potassium dichromate) I felt I might have been the last person on earth dedicated to this esoteric craft. I never imagined 20 years later I'd be watching a video about b/w reversal by someone so much younger, and that I'd actually be learning something from them. Amazing.

Thanks for this, I was confused why nobody was just selling B&W bleach by itself, now I know that the reversal process is more involved than “add an extra step and expose to light”

6:00

Not film related but that beard is at the perfect length. Looking very handsome brother

My current go-to BW reversal film is Arista EDU 400, shot at box speed. My process is pretty slow, but the slides are probably as close to perfect as I'll ever get. All at 68°F (20°C), I develop with Arista paper dev for 17 minutes 30 seconds (Constant agitation), wash for 15 minutes (Peroxide bleaches seem to make the film brown if there's any trace of this paper dev, probably could be shortened for copper), then bleach with copper sulfate bleach (For every 100ml water, add 5g copper sulfate crystals, 5g non-iodized salt, and 1g citric acid) for 10 minutes (constant agitation), wash for 6 minutes, 2 minutes 30 seconds in 2% ammonia (Constant, needs to have no additives), wash for 6 minutes, 6 minutes in a clear bath (20g sodium sulfite in 1 liter of water), wash 6 minutes, then redevelop for 10 minutes in Iron-Out (The toilet cleaner, add 40g to 1 liter water, filter before use, no reexposure needed), wash for 3 minutes, then fix and rinse as normal.

With the vinegar and peroxide photographic bleach, for one roll, you, need 60 mL of vinegar for every liter of hydrogen peroxide, take 350 mL of it and microwave it for 50 seconds at 1100 watts, it will fizz when bleaching is taking place, wait for a minute after the fizzing stops, then you can expose it to light, and then reuse the first developer. The positives will have a yellow tint, soak the film in tap water for 5 minutes, dump out the water, then replace with 350 mL of water, 1 teaspoon or 15 mL of citric acid powder, and 3 teaspoons or 45 mL of sodium thiosulfate (anhydrous) powder stirred up, soak for 7-1/2 minutes. Then rinse the film good as usual.

thank you for telling us about the developer when i wachted it got easer and now im a few steps away from making instant roll film. thank you

Great work, man. This kind of content really sets ya apart.

The most interesting and unique aspect of your process is the chemical fogging that you get by using Iron Out. I have not seen chemical fogging for B&W reversal before, and can't find any references in Anchell or Troop books, who recommend using a light. Examining the list of chemicals in Iron Out, we can recognize some typical developer components: (1) Citric Acid (Vitamin C?) is a developer, (2) Sodium Metabisulphite is a typical preservative, (3) Sodium Carbonate is a typical accelerator. No restrainer that I can see. So the only potential fogging agent would be the Sodium Hydrosulphite or possibly something not listed in the ingredients. The question is: can a separate agent be mixed that does the reversal fogging so that a more conventional developer can be used for the final development stage? This might simplify the overall process and give better control over the final steps. (However these last steps are "to completion" so adjustments to exposure, etc. are too late at that point. ).

Just had my first success using Ilford Multigrade dev and Hydrogen Peroxide. Thanks for your no-nonsense advice👏

The cute little rainbow in the background ❤️❤️❤️

Thank you so much for this. Just picked up a PCP-80 and can’t wait to project B&W

Thanks for assembling all that for folks to follow! Saw my blog quoted 😁. You probably know this, but you can use copper sulfate from the garden section in place of the ferric chloride. But of course there’s a point where you have a thing working and why mess with it.

Thanks for producing this video. I have always wondered why there isn't any black & white reversal film. Good luck with this work in progress. Hope others on here are able to share their experiences.

So much great stuff in this video! Now I know why trying to reverse non-reversal black and white film was always crap hahaha

Thanks for this. But please, be aware that Kodak entirely changed HC-110 acc. to Anchell and Troop in the latest edition of the Film Developing Cookbook. It may not perform as you expect.

Brilliant video

What a hero. Thanks so much for this. You've made it all a lot less scary to have a go at!