Temperature/ development adjustmetn for fiberpaper??

[naaldvoerder]

This summer I can't seem to get my darkroom temperature below 24 degrees Celsius, so now the results obtained with my spligrade are off the mark. Does anybody know a temperature/development table as is included in the datasheets for Ilford film is usable for fiberbased paper?

Thanks in advance

 

[TheFlyingCamera]

I have problems with keeping my water temperature in my darkroom down in the summer - to help with it, I get a big bucket of ice and mix it with the water I'm planning to use for mixing my developer. With a bit of experimentation, you can blend the icewater and the regular water to get your temperatures down to 20-22.

 

[john_s]

The Agfa pdf files for paper development had times for 20, 25 and 30degC. I can email you a copy if you're interested. Different times for different developers, but typically:

______ 20deg_______25deg______30deg
Fibre___90__________60________45sec

Rc_____ 60_________45________30sec

Sorry if the formatting isn't up to twenty-first century standards. I'm not with it! (but that's why my camera doesn't have a battery)

 

[naaldvoerder]

Thanks John, I would be interested. Can You send them to me?

jaapjanhelder@planet.nl

Thanks in advance

JJ

 

[dancqu]

This summer I can't seem to get my darkroom temperature
below 24 degrees Celsius, so now the results obtained with
my spligrade are off the mark.Thanks in advance

Let me guess; contrast is up some. What developer are
you using? If it contains hydroquinone and or glycin then
you've a more temperature sensitive developer. At least
hydroquinone is a high contrast component and when
more active will up the contrast.

I've read that glycin is a high ph metol. It is compounded
as so. It also is reported to be usefully active at warmer
temperatures. It would not up the contrast. Dan

 

[Tom Hoskinson]

Let me guess; contrast is up some. What developer are
you using? If it contains hydroquinone and or glycin then
you've a more temperature sensitive developer. At least
hydroquinone is a high contrast component and when
more active will up the contrast.

I've read that glycin is a high ph metol. It is compounded
as so. It also is reported to be usefully active at warmer
temperatures. It would not up the contrast. Dan

Dan: GLYCIN is p-hydroxyanilinoacetic acid.

Glycin is a slow powerful developer which keeps well in solution. The image it produces is a warm black color and is very free from fog.

Glycin is related to p-aminophenol and Metol.

Compared to Metol, glycin has a carboxyl group attached to the methyl group of the Metol.

Metol is p-(methylamino)phenol sulfate. Thus, Metol has a Sulfate attached.
Glycin has a carboxyl group (acetic acid) attached.

 

[dancqu]

Dan: GLYCIN is p-hydroxyanilinoacetic acid.
Glycin is a slow powerful developer which keeps well in solution.
The image it produces is a warm black color and is very free from
fog. Glycin is related to p-aminophenol and Metol.
Compared to Metol, glycin has a carboxyl group attached to the
methyl group of the Metol.
Metol is p-(methylamino)phenol sulfate. Thus, Metol has
a Sulfate attached.Glycin has a carboxyl group
(acetic acid) attached.

All the above and to boot recommended for stand development. Dan

 

[Tom Hoskinson]

Agfa 8 dilution for stand development

All the above and to boot recommended for stand development. Dan

Yes Dan, and to finally answer your previous Agfa 8 question, I dilute 100 ml of Agfa 8 stock solution with 400ml of water for stand development. I develop Efke 25 for 18 minutes at 22C with Semi-Stand agitation.

1. 2 minute presoak in 22C water.

2. 30 seconds of gentle agitation in the developer.

3. Stand without agitation for 9 minutes.

4. 30 seconds of gentle agitation in the developer.

5. Stand without agitation for the remainder of the 18 minutes.

6. Rinse in 22C water (no acid stop bath), Fix and Wash












i

 

[dancqu]

Yes Dan, and to finally answer your previous Agfa 8 question, ...

Agfa 8? Another thread's OP interest. Mine, Kodak D-78. Dan