Search found 35 matches

by tim.bowman
Fri Oct 02, 2020 5:19 pm
Forum: Black & White Film Development
Topic: Developers for Document Films?
Replies: 2
Views: 219

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: 55

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: 293

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: 2
Views: 492

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: 555

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: 947

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: 692

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: 692

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: 909

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: 909

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: 2708

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: 2594

Re: washing time with alkaline fixing

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

-t
by tim.bowman
Thu Aug 01, 2019 9:38 am
Forum: Fixers
Topic: washing time with alkaline fixing
Replies: 5
Views: 2594

Re: washing time with alkaline fixing

sanchell wrote: Sat Jun 08, 2019 11:53 am Prints should be kept with their backs facing backs and emulsion facing emulsion. Never wash prints with the emulsion facing the back of another print.
I read this everywhere, but I've never seen anyone explain why. What's so bad about having prints back to front?
by tim.bowman
Mon Jun 24, 2019 6:12 am
Forum: Black & White Film Development
Topic: Can Boric acid be used for Borax?
Replies: 3
Views: 1667

Re: Can Boric acid be used for Borax?

Bill Troop and I are including several formulas in the 2nd Edition of the Film Developing Cookbook, which is within a few weeks of going to the publisher.
Very glad to hear that little tidbit!
by tim.bowman
Tue Nov 21, 2017 11:38 am
Forum: Toning
Topic: So, polysulfide toner does... nothing?
Replies: 4
Views: 1909

Re: So, polysulfide toner does... nothing?

I suppose it makes sense that manufacturers are coating the same emulsion on both RC and FB. I hadn't made the connection myself. I love this forum for the collection of first-hand knowledge in all of your heads. Seems like every other place for chemical photography on the web is a collection of fol...
by tim.bowman
Mon Nov 20, 2017 6:17 am
Forum: Toning
Topic: So, polysulfide toner does... nothing?
Replies: 4
Views: 1909

Re: So, polysulfide toner does... nothing?

Ah, so I'm not losing my mind! Why on earth would anyone want to machine process fiber-based paper?! I have a 5-pack of Adox MCC 110, I'll give that a try. I've been curious about Opie's silver mirroring technique, but it's completely invisible in online photos of her work. Maybe one day I'll run in...
by tim.bowman
Fri Nov 17, 2017 10:59 am
Forum: Toning
Topic: So, polysulfide toner does... nothing?
Replies: 4
Views: 1909

So, polysulfide toner does... nothing?

I've tried Formulary's polysulfide toner twice now on Fomatone, with no change in image tone. Well, that's not precisely true. The first time I saw, or thought I saw, a nearly impreceptible move toward red compared to the untoned print. The second time, I got an ever-so-slight-but-possibly-imaginary...
by tim.bowman
Fri Oct 27, 2017 6:08 am
Forum: Open Discussion
Topic: Are any of the editions better than the others?
Replies: 2
Views: 1822

Re: Are any of the editions better than the others?

I have both an early edition and the most current. It hasn't gotten anything but better. The current edition is more comprehensive, more reviewed for errors, and includes tips and tricks from a more diverse selection of photographers than the earlier one.
by tim.bowman
Tue Oct 10, 2017 9:00 am
Forum: Black & White Printing (formerly Enlarging & Printing)
Topic: Similarities in MQ developers
Replies: 12
Views: 5457

Re: Similarities in MQ developers

A quick update: I am now routinely mixing this with no carbonate or bromide in the stock. I add them directly to the tray when printing. Being able to do a divided D-72 is nifty for messing around with paper negatives. The metol, sulfite and hydroquinone seem to keep pretty well. I had a batch that ...
by tim.bowman
Mon Sep 25, 2017 5:16 am
Forum: Darkroom Equipment
Topic: Datatainer labels
Replies: 3
Views: 1930

Re: Datatainer labels

Asking questions is never stupid. I use grease pencil (a.k.a. china marker.) It comes off with a bit of rubbing if you need to change the label. Sharpie marker works if the bottle is dry, but it's... permanent, you know? Later, you can cover up the marker with a piece of masking tape. Again, the bot...
by tim.bowman
Fri Jun 09, 2017 6:33 am
Forum: Black & White Printing (formerly Enlarging & Printing)
Topic: Similarities in MQ developers
Replies: 12
Views: 5457

Re: Similarities in MQ developers

It turns out this flexible MQ developer things is a way deeper rabbit-hole than I expected. This last batch of MQ without restrainer or accelerator got me to thinking... The Cookbook has a formula for divided D-23 which is pretty simple -- just put the carbonate in a separate tray. Could I do the sa...
by tim.bowman
Thu Jun 01, 2017 9:54 am
Forum: Black & White Printing (formerly Enlarging & Printing)
Topic: Similarities in MQ developers
Replies: 12
Views: 5457

Re: Similarities in MQ developers

I've been through two batches now and it seems to work well. It keeps just as well as Dektol. Just last night I mixed a batch with absolutely no carbonate or bromide in the stock, thinking that way I can get maximum flexibility when adding them later. I'm curious to see if it keeps okay with only th...
by tim.bowman
Fri May 19, 2017 11:55 am
Forum: Paper Negatives
Topic: Developer-incorporated papers
Replies: 0
Views: 1664

Developer-incorporated papers

What are you folks using for paper negs these days? I'm almost at the end of my stash of old Ilford MGIV and so I'm looking around for a new paper to adopt for paper negs. I've tried the new Ilford MG, Ilford's MG RC paper, and Unibrom's single-weight grade 2. They are all developer-incorporated pap...
by tim.bowman
Thu Mar 30, 2017 7:39 am
Forum: Black & White Printing (formerly Enlarging & Printing)
Topic: Similarities in MQ developers
Replies: 12
Views: 5457

Re: Similarities in MQ developers

If you do try it, perfesserkev, please let me know how it goes. I struggled to find simple directions for mixing tray-strength. And now that I've used it a few times, I'm sorely tempted to do some rounding-off, even though I would deviate from the original formulas. I'm curious to hear how other pri...
by tim.bowman
Thu Mar 30, 2017 7:32 am
Forum: Black & White Printing (formerly Enlarging & Printing)
Topic: Dry-down dramas
Replies: 8
Views: 3610

Re: Dry-down dramas

That's a great idea. Thanks for the tip! I'll have to keep my eyes open when the students are moving out of the dorms next month.