Negatives are FP4+ and Fomapan 100 |
I
have had the opportunity to use RO9s/Studional as it was intended.
Multiple development from
the same batch of developer (1 litre will do 12 films). This is a new
departure for me, I prefer the single use type. I was a little
apprehensive with this decision but gathered four 120 format films
together so I could put to the test the assertion that you can
develop any number of film on the same day it was diluted without
having to add a compensation factor for each film involved, as you do
with other developers. This was something I had not heard of before.
Made using a Zero multi format pinhole camera. |
As
mentioned before in another article the developer has a syrup
consistency to it as you pour it out. At this point I must add a
warning because of the concentrated nature of RO9 special/Studional
you need to take precautions when pouring it out to make up the
working solution. I have found out to my cost that if you get it on
your hands it has a nasty bite. Something I have not experienced when
mixing up other developers.
Made using Bronica SQAi. |
Made using a Bronica SQAi. |
The
method I used was made up of my trusted inversion procedure and a
returning of what was left of the 600 mls of developer back to the
storage bottle. Let me explain, when you pour the developer out of
the tank there is a a certain amount of fluid lost to this action. It
is only a small amount but can be enough to stop the top edge of the
film being fully immersed. With this in mind I poured the developer
back into the litre bottle and then poured it out again into the
measuring cylinder before each film processed. I could have just
topped up the difference. This is me erring on the side of caution.
This action may have rejuvenated any depletion that had occurred but
I suspect that this is not the case with this developer.
Idle
time between
two
batches
|
Development
lengthened
by
|
few
hours (but development none *on same day)
|
None
*
|
1
– 3 days
|
5.00%
|
4
– 8 days
|
10.00%
|
1
– 2 weeks
|
15.00%
|
over
2 weeks
|
20.00%
|
No comments:
Post a Comment