arista e-6 with jobo

[wager123]

hi all
just started to do e-6 with my cpp-2 and ordered the arista e-6 kit. the instructions give a temp of 105
. jobo only goes to 40 c. what temp should I use . I can't find an answer on the web. anyone using the arista kit with a jobo?
thanks
for the help.
mitch

[Fred L]

105° is fahrenheit otherwise you'd be boiling your chems ;) 40°c is just about 105°f

[wager123]

fehrenheit is what I ment

[Fred L]

if kit says 105°f, then 40°c should do. (40°c = 104°f)

my cpp-2 has a scale by the controls showing celsius and fahrenheit equivalents.

[Brian C. Miller]

Remember to actually measure the water bath temperature with a good thermometer. Sometimes the Jobo calibration may be off.

[Greg Blank]

Adjacent to Brian's statement, if you are checking the temperature be aware that Jobo CPP-2 were or should be calibrated where the temperature comes out of the outlet in the trough. That temp will be about 4 tenths of a degree above what the display actually reads. Its is to allow for a drift by reading at the displayed temperature so that the majority of your drum stays at the displayed temp. I've seen Cpp2 off as much as a couple of degrees, as long as you can hold a temp and reach the desired temp it should not be a big deal.

[jbenedict]

I use the calibration of the temperature knob as a 'suggestion' I fill one of the beakers with water and put a dial thermometer into it to get an accurate measurement and to monitor the temperature during the processes.

[Greg Blank]

The idea is not just to monitor the chemistry in a beaker when color processing, if the temperature in the lower bath is correct the upper trough temp at the drum can be a good amount higher, enough to skew the results desired.

[Fred L]

also a very good reason to constantly recirculate the water from top to bottom.

[Jim Noel]

The Jobo drums are plastic and do not pass temperature effectively. If you start with teh temp correct in a beaker and the water bath temperature is close, you will not have a problem.

[Greg Blank]

Actually, the suggestion from Jobo for use with drums (especially Expert drums) and color chemistry is to preheat the drum in the bath, with the drum rotating. I would add that you should monitor both the trough and the chemicals in the breaker. Anything beyond a 5 tenths of a degree difference from the chemistries suggested temperature and you are adding potential color shifts to your color film.