----- Original Message ----- From: <[EMAIL PROTECTED]> To: "PDML" <[EMAIL PROTECTED]> Sent: June 3, 2001 2:40 PM Subject: Re: 5 films in one tank DEVELOPING > > Thanks to both of you for your replies. Some more questions follow: > > 1) DEVELOPER CAPACITY & TIME INCREASE > When I run 5 films through it, using the stated 1150ml of developer, from 1 litre of stock Microphen, for example. Now I pour the developer back to its flask, and load > another 5 films. I want to run them again in the Microphen, which has stated capacity per litre of stock dilution = 10 films (with appropriate increase in time). How > much shall I now increase the time for the second run of 5 films? Shall I increase it 40% (as if doing 1 film per run, and after 5 films) ? Ummmmm.........I recall from an earlier posting that you are using the developer at a 1:1 dilution. Since the tank capacity is 1150 ml, you would be using 675ml of stock solution. Ilford says the capacity of the developer is 100ml of stock solution per 135/36 or 120 film. If this is how you are processing, I would just use the developer once and pour it out. If cost is a factor, and you don't want to dump 175ml of developer every tank, try using 500ml of developer per tank and increasing the development time to compensate for the loss of activity due to dilution. As a guess, I would start with a 20% increase in time in the instance that I have described. > > 2) TO BILL: > Actually, I think my tank is older Jobo. I thought about buying the 150x series new (the price of tank is nice, but the REELS are ridiculously expensive), and the reels > price turned me off. The tank I have is propably older, written JOBO 1000, and holds not 560ml max capacity but 1150ml max capacity for 5 35mm reels. It is also > NOT compatible with the JOBO processor system. But for my purposes is advanced enough - the plastic reels are so good they can be loaded even if wet. > Normally, hand-agitation small tanks holding 2 35mm reels have about 550ml capacity, same as jobo 150x with 5 reels. > What's your opinion now, when you know my tank is not the 150x series and is 2x as big? Thanks! I suspect that your tank is probably very similar to what I am using. The major difference being the lid that attaches to the processor. Are the reels 90mm in diameter? The Jobo 1500 series uses 1210ml to process 5 135mm films if used as an inversion agitation tank. For muself, as long as the equipment works, I am happy to use it. Jobo has always made well thought out darkroom gear, so while I am not familiar with what you are using, I would think it will do the job, unless there is something damaged or worn out about it. > > I am sorry to clutter the list with two similar threads. But my mailer is behaving strangely, forcing me to write my question about agitation in Large tanks (when > looking up data in e.g. Kodak charts), and if my tank is to be considered as Large in anotther thread. Sorry! You are using a small tank. William Robb Remember, the LX Gallery is coming up. Please see: http://pug.komkon.org/LX_Gallery/LX_Submit.html for more information. - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org .
