- Joined
- Sep 11, 2015
- Messages
- 644
- Format
- 35mm
Good to know about success with HR-50.
PCM20 [and probably HC-110] do not work with microfilm type films to give pictorial contrast, at least for practically useable EIs.
I tried Spur Ultra R 800 at EI=10 in PCM20 for the dilution and times as specified in the massive development chart for HC-110 with Adox CMS20 but only obtained underexposed shadows and blown highlights that could not be rescued electronically.
OTOH the Adox HR-50 ,Aviphot 80 modified by the proprietary speed boost process, works very well in PCM20 with the scanner on auto and likely would print on silver gelatin satisfactorily:
Thanks to this thread, I've switched from a D23 guy to using PC-512. Separately, I'm also mixing TF-3 Fixer, a Sodium Sulfite Hypo and using LFN, so a 100% recently new process, and I'm hanging my film on a 45 degree angle. The chemistry is pretty simple, inexpensive and mixes just 1 liter at a time with emphasis on one-use (except for the Fixer). Didn't expect to land on the "Fresh every time" crowd, but I guess that's where I am. And surprised to find out how simple and satisfying it can be. Feel like I've gotten control - at last ( or at least "more" control ).
I deliberately left a half bottle of PC-512 on the shelf for an extended period of time, to test its activity... As a bonus, I found out that it is an excellent developer for CatLABS 80.
Alan, let me try 8 minutes first.
The storage test concentrate of relistan's formula PCM20 is now 8 months old (pic) and the concentrate I use is now 5 months old (July 2024).
Both show more crystals but fortunately they stick to the surfaces of the containers and do not float about, making it possible to decant the solutions (for now) if needed.
Results of developing Delta 100 using HC-110 times and dilutions from the massive development chart remain as previously found:
The storage test concentrate of relistan's formula PCM20 is now 8 months old (pic) and the concentrate I use is now 5 months old (July 2024).
Both show more crystals but fortunately they stick to the surfaces of the containers and do not float about, making it possible to decant the solutions (for now) if needed.
Results of developing Delta 100 using HC-110 times and dilutions from the massive development chart remain as previously found:
My concentrate is approaching two years.
I'll try PCM20 now. My experience with DCM18 has been not very encouraging.
The negatives came very thin. Although, I didn't have time to experiment more. I'll try DCM18 again when I will have more time.More specific feedback would be appreciated. What was not encouraging? The results, the lifespan of the developer, the dev t
The negatives came very thin. Although, I didn't have time to experiment more. I'll try DCM18 again when I will have more time.
I now think that changing the Metaborate from 20g to 18g was a mistake because it gives thinner negatives with HC110 times.
This is why I changed back to using the original formula of @relistan which uses 20g and phenidone.
Hey everyone, I went mostly silent here for a year... life caught up. But early last year while working on two bath developers I ended up with a formula that I liked a lot for a single bath developer. It's not revolutionary at all, but I have been using it a lot and really like the results. You might, too, so I wrote up a post about it on my blog:
A Simple Phenidone/Vitamin C Concentrate Developer: PC-512 Borax
What follows is how I formulated a very nice developer that I have now used pretty much exclusively for the last year and a half. As it says in the title, I have called it “PC-512 Borax”. Creative name? No. But it is indicative of the formula. This nice developer is a secondary result of some...imager.ie
It's a developer in the family of PC-Glycol. I have used that developer a lot and this one gives me substantially better results. It also has a much better Dmin than PC-Glycol, about 0.3 for Delta 100.
Here are some photos I developed with it (Delta 100)
View attachment 321968View attachment 321967
You can read it where it's posted.Please post the formula directly on the forum page.
I noticed a decrease in negative density with time using PCM20 and after about 6 months I made a test (attachment).
This shows that after 6 months there is a notable decrease in negative density using both PCM20 and DCM18.
After 6 months an increase in development time of more than 50% is needed to restore the negative density to that obtained with fresh concentrate.
IMO is fairly clear that neither of the concentrates PCM20 or DCM18 is going to be a satisfactory stable HC-110 substitute and if it is wished to use PC Borax developer it is better to use PC 512 Borax described by @relistan at the start of this thread as this does not lose activity.
I will carry on tinkering with the concentrate PCM20 until it is used up as it is otherwise quite a nice developer.
Since this thread popped up a while back and I was hankering for a palate cleanser, I thought I would mix some up. I don't really have an opinion on it since the rolls (HP5) I developed were more throw aways. I don't even remember what cameras I used. Kind of what I expected. Nice tones. One thing though is I had a devil of a time getting the AA into the Glycol. Even with heat and a magnetic stirrer I eventually gave up and still had some crystals left over.
View attachment 376655
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