Search found 48 matches

by tim.bowman
Wed Apr 24, 2024 7:54 am
Forum: Member Announcements
Topic: Darkroom Cookbook 5th edition
Replies: 3
Views: 15787

Re: Darkroom Cookbook 5th edition

Thank you. Keeping my fingers crossed for a smooth path to print!
by tim.bowman
Mon Apr 22, 2024 6:00 pm
Forum: Member Announcements
Topic: Darkroom Cookbook 5th edition
Replies: 3
Views: 15787

Re: Darkroom Cookbook 5th edition

Steve, Amazon has the 5th edition listed for an October release. Is that correct?

https://www.amazon.com/Darkroom-Cookboo ... 1032404868
by tim.bowman
Mon Apr 22, 2024 5:56 pm
Forum: Black & White Printing (formerly Enlarging & Printing)
Topic: overwashing fiber based silver gelatin prints
Replies: 8
Views: 6474

Re: overwashing fiber based silver gelatin prints

Thank you, Steve. I figured it was either to ensure water circulation or to avoid scratches. Thank you for the detailed explanation!
by tim.bowman
Thu Apr 18, 2024 6:38 am
Forum: Black & White Film Development
Topic: Strange black speckled areas at edge of film (lighter on negative)
Replies: 14
Views: 1462

Re: Strange black speckled areas at edge of film (lighter on negative)

That looks kind of like air bubbles during development to me. Is that top edge parallel to the spiral on your reel? I get something similar on 120 if I'm not giving the tank a good rap to dislodge them. The bubbles displace the developer and make the neg thinner along the reel.
by tim.bowman
Thu Apr 18, 2024 6:34 am
Forum: Black & White Printing (formerly Enlarging & Printing)
Topic: overwashing fiber based silver gelatin prints
Replies: 8
Views: 6474

Re: overwashing fiber based silver gelatin prints

And finally never ever place the face of a print (silver side) against the back of a print. Always stack them in the tray back-to-back (non-silver paper base) and face to face (silver coated side to silver coated side). This is of extreme importance to proper washing. I have seen this recommendatio...
by tim.bowman
Tue Feb 27, 2024 11:34 am
Forum: Paper Negatives
Topic: PND, A Divided Developer for Paper Negatives
Replies: 0
Views: 1250

PND, A Divided Developer for Paper Negatives

Hello folks. I recently typed up my developer for paper negatives: https://hellothisistim.com/blog/pnd-paper-negative-divided-developer/ The process has two goals: control contrast, and maximize acutance. I'm getting paper negs that print nicely with a grade 2 filter. It was a long path to get here,...
by tim.bowman
Tue Feb 27, 2024 11:00 am
Forum: Black & White Film Development
Topic: X Ray FIlm Questions
Replies: 1
Views: 504

Re: X Ray FIlm Questions

I haven't shot any xray film, but I've shot a lot of paper negatives and litho film. I believe the density problem is similar. I'd look to more dilution on the developer before I'd start trying fiddly stuff like cold or restrainers. For litho film, I'm using a developer (Bill Troop's TDLC-103) that'...
by tim.bowman
Fri Sep 01, 2023 10:46 am
Forum: Darkroom Equipment
Topic: Beseler 45MCRX tear in lower bellows
Replies: 6
Views: 14423

Re: Beseler 45MCRX tear in lower bellows

Re: On the subject of bellows Does anyone know where one can get bellows replaced or how make a bellows. I have a Super Chromega D, Dichroic enlarger that needs a new bellows. Thanks for any info, Constantine JB Harlan (I believe this is the same JB Harlan that was posting above, yes?) has these be...
by tim.bowman
Fri Sep 01, 2023 6:44 am
Forum: Black & White Film Development
Topic: Figuring out developing times
Replies: 2
Views: 4530

Re: Figuring out developing times

Lots of folks like the Massive Dev Chart for this. But I actually prefer trial and error. Take your best guess, make a print, and see how it goes. If you're struggling with shadows, give the film more exposure next time. If it's too contrasty, develop less. If it's too flat, develop for longer.
by tim.bowman
Fri Jan 14, 2022 3:19 pm
Forum: Black & White Film Development
Topic: Recipe concentration
Replies: 1
Views: 1977

Re: Recipe concentration

Yes, the developer recipes are all to make a stock solution, which is often diluted for use.
by tim.bowman
Wed Jan 27, 2021 8:42 am
Forum: Gum Printing
Topic: Exposure times for gum vs. cyanotype
Replies: 5
Views: 17361

Re: Exposure times for gum vs. cyanotype

Thanks for the recommendation. I do have that book. It's a great resource. I still make terrible gums. Maybe my magic chicken bone needs a recharge.
by tim.bowman
Mon Jan 25, 2021 3:46 pm
Forum: Gum Printing
Topic: Exposure times for gum vs. cyanotype
Replies: 5
Views: 17361

Re: Exposure times for gum vs. cyanotype

Thank you very much Mr. Anchell, and please pass my thanks along to Ms. Enfield. I think hers is the only book on alt process that I haven't read yet. By this metric I'm massively overexposing my gums. Am currently struggling with the gum just dissolving off the paper during a 15 minute face-down so...
by tim.bowman
Thu Jan 21, 2021 5:28 pm
Forum: Gum Printing
Topic: Exposure times for gum vs. cyanotype
Replies: 5
Views: 17361

Exposure times for gum vs. cyanotype

Hi folks. Can anyone offer an approximation of how their gum exposure times relate to the exposure times for cyanotype with the same UV source? Same? Half? Double?
by tim.bowman
Fri Oct 02, 2020 5:19 pm
Forum: Black & White Film Development
Topic: Developers for Document Films?
Replies: 2
Views: 4491

Re: Developers for Document Films?

Richard, I've had good results with Troops TDLC-103 from page 133 of the FDC, 2nd ed. I'm using half a gram of metol and getting good results with Arista litho film. Troop recommends minimal agitation on page 133 and I agree.
by tim.bowman
Thu Oct 01, 2020 5:03 pm
Forum: Toning
Topic: Bleach question
Replies: 0
Views: 11242

Bleach question

Actually, two bleach questions. I'm using the rehalogenating bleach from p332 of the Cookbook 4th ed. with thiocarbamide toner and loving the splits I see using short bleach times. I've been pouring it back in the bottle and keeping it for the next session. It seems to be working fine. Does the blea...
by tim.bowman
Tue Jul 28, 2020 10:02 am
Forum: Black & White Film Development
Topic: Film Development time for scanning?
Replies: 2
Views: 4429

Re: Film Development time for scanning?

Hi Richard,

I think that you'll find scanning is much more flexible than the photo papers that were available when that book was published. Either of those targets should work. As long as the scanner can get light through the brightest bits, you're good to go.
by tim.bowman
Thu Jun 18, 2020 8:08 am
Forum: Black & White Printing (formerly Enlarging & Printing)
Topic: Aristo cold light head
Replies: 6
Views: 11511

Re: Aristo cold light head

I won't pretend to be an expert here, but I have used a cold-light adapted Omega D2 for a while. I never owned a stabilizer and didn't see a need for one in my printing. I have used both graded paper and variable-contrast and both work fine. My thermo unit switch doesn't have an indicator light on i...
by tim.bowman
Tue May 12, 2020 11:49 am
Forum: Open Discussion
Topic: A simplified zone system table for field use
Replies: 1
Views: 12094

Re: A simplified zone system table for field use

Thank you so much for sharing this. It takes all the mental gymnastics out of being zone-y!
by tim.bowman
Thu Apr 02, 2020 4:33 pm
Forum: Black & White Film Development
Topic: Minimum Developer per 80 sq. in. of film - clarification
Replies: 5
Views: 6894

Re: Minimum Developer per 80 sq. in. of film - clarification

Todd, it should be option B. He's recommending the total volume of the diluted developer, not the amount of stock.
by tim.bowman
Thu Apr 02, 2020 4:31 pm
Forum: Black & White Film Development
Topic: Latent image fading
Replies: 3
Views: 5637

Re: Latent image fading

Thanks Steve. There's so much completely wrong information about film photography in the internet. It makes me wonder how many people who post have actually done any darkroom work. By the way, thank you once more for the Darkroom Cookbook. This week, I rescued a box of lightly fogged paper by adding...
by tim.bowman
Mon Mar 30, 2020 10:36 am
Forum: Black & White Film Development
Topic: Latent image fading
Replies: 3
Views: 5637

Latent image fading

Does anyone here have any data (or can point to any research) about latent image fading? I read somewhere on the internet (APUG, perhaps, can't remember) that latent images on film/paper fade over time if you wait to process them. I convinced myself that I saw latent image fading in my larger format...
by tim.bowman
Thu Feb 13, 2020 12:56 pm
Forum: Black & White Film Development
Topic: divided developers
Replies: 4
Views: 6109

Re: divided developers

Thank you! The Darkroom Cookbook has been an amazing reference. Thanks for all the work you do to make the book happen.
by tim.bowman
Tue Jan 28, 2020 11:02 am
Forum: Black & White Film Development
Topic: divided developers
Replies: 4
Views: 6109

Re: divided developers

It's not quite the same application, but I'm using a homebrew divided MQ developer with paper negatives and litho film. I started dividing the developer looking for a way to limit the paper neg contrast and get some compensating action. Modern developer-incorporated paper emulsions make that tricky ...
by tim.bowman
Tue Sep 03, 2019 4:48 am
Forum: Member Announcements
Topic: The Film Developing Cookbook 2nd ed.
Replies: 9
Views: 25695

Re: The Film Developing Cookbook 2nd ed.

Congratulations to both of you! We're looking forward to reading it.
by tim.bowman
Mon Aug 05, 2019 12:15 pm
Forum: Fixers
Topic: washing time with alkaline fixing
Replies: 5
Views: 9040

Re: washing time with alkaline fixing

That makes a lot of sense. Thank you for breaking it down for me!

-t