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#1
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Rinse water for CPE-2
Jobo E6 process specifies 2 rinses. First uses x4 water and the second
x10. How do you keep the water at the right temperature? Does anyone use a cooler? Jobo manual suggests having water @5C higher that required - is this sufficient? Appreciate the help, alex |
#2
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Rinse water for CPE-2
On 3 Jan 2006 12:12:14 -0800, "
wrote: Jobo E6 process specifies 2 rinses. First uses x4 water and the second x10. How do you keep the water at the right temperature? Does anyone use a cooler? Use a thermometer and draw 38C/100F water from the tap. If you have separate hot/cold taps, you may want to look into installing a manifold with an integrated thermometer. For final rinses, I always use the Jobo film washer that plugs into the tank funnel opening and attaches to the faucet. Constant irrigation with whatever temperature is necessary - no multiple water changes on the lift. -- Strange, Geometrical Hinges: http://rob.rnovak.net |
#3
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Rinse water for CPE-2
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#4
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Rinse water for CPE-2
" wrote: Jobo E6 process specifies 2 rinses. First uses x4 water and the second x10. How do you keep the water at the right temperature? Does anyone use a cooler? Jobo manual suggests having water @5C higher that required - is this sufficient? Well first of all you don't say what chemistry you're using (i.e., Tetenol, Kodak, 3 step, 6 step, etc.) And I don't know what you're referring to by x4 and x10. 5C is a huge temperature variation... For standard E6: The first rinse is between the First Developer and the Reversal Bath. Second rinse is after fixing where temperature and time isn't critical (i.e., second rinse is 33C to 44C.) For the first rinse, solution temp is also less critical than for First Developer temp (only +/- 1C vs. 0.3 C for the developer.) I simply keep my rinse water solutions at the same temperature as all my other solutions. There's no need to have a drastically higher temp for your rinse solutions since the whole point of Jobo rotary is that it maintains temperature consistency. Solution temperature for the first developer rinse, reversal, and color developer are +/- 1C. Having a first developer rinse 5C higher than other solutions would likely cause reticulation. |
#5
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Rinse water for CPE-2
Tom,
I assumed everyone has Jobo E6 manual in front of them. My fault. Here is what it says for both Kodak E-6 and Tetenal E-6: Temperature 38°C (100°F) Pre-Warm 5:00 First Developer 6:30 (All Fuji films only: use 7:30) Rinse 2:00 (4x 0:30) Reversal Bath 2:00 Color Developer 4:00 Conditioner 2:00 (or Pre-Bleach) Bleach 6:00 Fixer 4:00 Rinse 5:00 (10x 0:30) 4 x.30 simply means 4 chages of water 30 seconds each. So, if I use 600ml of chemicals, I need 2.4L of water for the first rinse, and 6L for the second. My CPE-2 has barely room for 6 bottles w/chemicals, so rinse water must be kept somewhere else :=( The Jobo manual suggests having rinse water (in a jar) about 5C higher so by the time you need it it's about right. I was wondering if there are better ways. alex |
#6
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Rinse water for CPE-2
" wrote: Tom, I assumed everyone has Jobo E6 manual in front of them. My fault. Here is what it says for both Kodak E-6 and Tetenal E-6: Temperature 38°C (100°F) Pre-Warm 5:00 First Developer 6:30 (All Fuji films only: use 7:30) Rinse 2:00 (4x 0:30) Reversal Bath 2:00 Color Developer 4:00 Conditioner 2:00 (or Pre-Bleach) Bleach 6:00 Fixer 4:00 Rinse 5:00 (10x 0:30) Yes but note that after the color developer the temperature can be anywhere from 33C to 40C. First developer is critical at +/- 0.3C or 0.5F. First developer rinse is +/- 1C or 1.8F, as is the reversal and color developer. After that all solutions are less temperature critical. See Rotary-Tube Processors at http://www.kodak.com/global/en/servi...als/z119.shtml 4 x.30 simply means 4 chages of water 30 seconds each. Which is what I do... So, if I use 600ml of chemicals, 600 ml? You must mean 4x150ml for 600 ml total rinse water for the drum you're using? With my 3060 4x5 drum I use 240ml max. I.e., 4x240 ml per rinse for 960 ml. I need 2.4L of water for the first rinse, and 6L for the second. For the second rinse, which comes after fixing, you can simply open the drum and use running water at 90 to 100 F (33-44C.) There's not need to store water since temperature for the second rinse isn't so critical. My CPE-2 has barely room for 6 bottles w/chemicals, so rinse water must be kept somewhere else :=( The Jobo manual suggests having rinse water (in a jar) about 5C higher so by the time you need it it's about right. O.k., I get it, but that then refers to standing water, not tempered solution. This would be fine for the second rinse but I wouldn't use this method for the first rinse. I was wondering if there are better ways. Someone else posted about using a Jobo tempering bath. I use a TBE-2 for storing additional liters of solutions/water to E6 temperature. But you could use any tempering bath to do this. Or maintain a water faucet/flow temperature for rinsing. Sounds like you don't have a temperature control water valve for maintaining a constant water (faucet) temperature. If you're doing a lot of E6 I'd recommend one of these, or some sort of water bath that can provide +/- 1C for the first rinse. |
#7
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Rinse water for CPE-2
Alex wrote:
[snip] 4 x.30 simply means 4 chages of water 30 seconds each. You don't write where you are doing the processing. If you have access to running H&C water and a sink, I have found a redundant thermostatically controlled shower mixer does the job well. It's not quite accurate enough for the first rinse but is loads easier, and makes it simple thereafter. So, if I use 600ml of chemicals, I need 2.4L of water for the first rinse, and 6L for the second. My CPE-2 has barely room for 6 bottles w/chemicals, so rinse water must be kept somewhere else :=( The Jobo manual suggests having rinse water (in a jar) about 5C higher so by the time you need it it's about right. As you write, the on-line manual means 4 changes of water, you are likely to be using c.200ml. for a small tank and 600ml. or more only if you are processing up to 10 films at once in the largest tank. That makes c.1 litre for the first rinse. regards, mutley |
#8
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Rinse water for CPE-2
you are likely to be using c.200ml. for a small tank
??? 200ml is not enough to develop more than 1 roll in CPE-2. Do you develop one E6 roll at a time in your JOBO processor? |
#10
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Rinse water for CPE-2
Interesting. So, you are using 200ml in a 2521 tank loaded with two
35mm rolls. Were those 24 or 36 shots rolls? The current Kodak E6 Single Use manual recommends 140 ml per 35mm (36 shots) or 120 roll. I know some use 125 ml per roll (Kodak E6). You seem to have good results with 100ml per roll with Tetenal E6. Do you increase first developer time much, and what slide film(s) do you use? regards, alex |
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