Push to 1600 with Microphen 1:1 ?

[minoltist7]

I need to develop 3 films
HP5+ 400 shot as 1600
Tri-X 400 shot as 1600
Delta 3200 shot as 1600

and I have only 1L (standard package) of Microphen prepared.
Whan can I do with it ? Stock solution 1000ml isn't enough to divide to 3 parts (my tank requires 590ml for MF film ).
I can develop them all in a batch, increasing time to 10% after each,
or use 1:1 solution , which will allow to process 3 films and half separately. I'd go for the second m but I don't know timing for 1:1. Ilford datasheets contain dev.time for stock solution only

 

[john_s]

Ilford have some suggestions in a pdf about their powder developers:

http://www.ilfordphoto.com/Webfiles/200621612182416.pdf

 

[martin s]

I'd (re-)use the stock solution, it worked for me. Some say you don't have to increase times, I did though. After the liter was finished I moved on to other developers, Microphen just isn't my cup of tea.

Good luck.

 

[venchka]

Xtol will work and Kodak has times.

 

[Roger Hicks]

1+1 will give you the most speed, most reliably. Re-use inevitably builds hydrobromic acid, reducing true ISO, so you're having to overdevelop more with each subsequent run. True ISO of those films in Microphen 1+1 is about 650 (HP5 and Tri-X) and 1250 (Delta 3200) so you're looking at pushes of 1-1/3 stops for the slower films and 1/3 stop for the fast one; 1600 is about the minimum I care to rate Delta 3200 (developed as for 3200) as it tends to look flat otherwise.

Xtol will give less speed, and besides, as you said, you haven't got any.

Cheers,

R.

 

[minoltist7]

1+1 will give you the most speed, most reliably. Re-use inevitably builds hydrobromic acid, reducing true ISO, so you're having to overdevelop more with each subsequent run.

I'd rather go for 1:1 but how to guess development time?
Ilford datasheet doesn't have that
Can I use coefficient, based on stock-to-1:1 ratio from other films?
for example Ilford Delta 400: stock 10:30, 1:1 - 19
stock to 1:1 ratio is ~1,833-1,875 , so I can calculate timing for HP5+ and Tri-X respectively, by multiplying to 1,833 ?

so for HP5+ at 1600 it should be:
stock 11 min -> 1:1 20 min

for Tri-X at 1600
stock 15 min -> 1:1 29 min

Delta 3200
9 min -> 1:1 16.30

am I right ?

ps. I don't have XTOL , the other developers I can get is Rollei RHS and Tetenal Ultrafin (liquid 1:10 or 1:20 )

 

[Roger Hicks]

Personally I'd just double it. That will result in slight overdevelopment, but I'd rather have that than slight underdevelopment! Alternatively, yes, I'd suspect that your equations are close enough. Put it this way: I'd not go under 1.8x or over 2x.

You're not missing very much, in my view, by not being able to get Xtol.

Cheers,

R.

 

[minoltist7]

Results of my push:

Tri-X as 1600 in Microphen 1:1, 29 min at 20 C

big size:
http://pics.livejournal.com/awaken77/pic/0024629e

 

[minoltist7]

HP5+ as 1600 in Microphen 1:1, 21 min at 20 C

 

[minoltist7]

Delta 3200 as 1600, Microphen 1:1, 17 min at 20 C

 

[venchka]

HP5+. It continues to impress me.

 

[minoltist7]

Tri-X at 1600, Microphen 1:1 29 min
that's a damn good combo, in terms of shadow detail and grain. unfortunately I can't get more Tri-X at my location

btw - I think to switch to liquid developers, I'm more comfortable with it. How good is DDx for push , if compared to Microphen ?
is it sort of "liquid microphen" version, or very different thing ?

 

[Roger Hicks]

DD-X is indeed very similar to a 'liquid Microphen'. The main reason for changes are solubility and resistance to hydrolysis.

All the pics worked very well, I think, but I see no advantage in the Delta 3200.

Cheers,

R.

 

[minoltist7]

All the pics worked very well, I think, but I see no advantage in the Delta 3200.

I see too. i'll no longer use it, becouse pushed HP5 or Tri-X produces better result imho

 

[ajuk]

Results of my push:

Tri-X as 1600 in Microphen 1:1, 29 min at 20 C

big size:
http://pics.livejournal.com/awaken77/pic/0024629e

That's good but MDC says 12 minutes for that combo, how are you getting away with it?