There are a number of inconsistencies in this thread, however, each to their own I suppose.
I have used the 4x5l Ektacolour RA4 replenisher for at least 20 years and always followed it to the letter - BUT - the way I have progressed I ALWAYS use the following dilutions. If you are using a NOVA Processor where the chemicals are stored for further use after each session -for 1 ltr working solution the correct mixes are as follows:-
25cc of 'A'
12cc of 'B'
25cc of 'C'
80cc of 'starter'
For 2 ltrs just double the quantities
For the replenisher use the same mix as for the prime solutions, but leave out the starter.
For those who use a rotary drum or dish you will need to use the starter for every fresh mix.
When mixing either the prime solution or the replenisher, ALWAYS add the different solutions to the water which should be warm, say around 25 30 degrees C otherwise they may not mix properly. The solution will initially go green but soon clear and go to a pale straw colour.
There is absolutely no need to mix all 20 ltrs at once, but for the replenisher it is best that the solution is stored in dark brown glass bottles. I use a mixture of empty wine bottles with a screw top and 500cc bottles bought from the Pharmacy. They really are very cheap. When breaking into a new bottle of replenisher I decant the contents into 100cc bottles as I find 100cc is enough for an evenings session.
Concentrate solution 'A' will go off in a part empty bottle and it will be of no use. Either squeeze the bottle to exclude all the air or, as I do add glass beads to bring the level up to the top of the bottle so there is no air to speak of.
100cc per 80sq inches of paper. it doesn't matter if you over replenish, but it does, if you under replenish. You will find the solutions don't last as long and you may start to get odd colour casts as the chemicals deteriorate.
The same replenishment rates apply for the Bleach fix and the stop bath.
I use a 12 x 16 Nova and currently, the original working solution was mixed at the end of June 2012 and is still working perfectly. I have just made a fresh 1 litre of replenisher which I am using and have found little or no difference when developing the prints with regard to colour balance.
by varying the methods of mixing/concentration you will never get consistency and you will be making it hard work for yourself.
If you don't use the 'starter' initially it will work, - because the paper contains a similar chemical and gradually the starter level builds up, but I doubt if it ever gets to the correct level to get the best out of the developer
Last edited by BMbikerider; 04-19-2013 at 12:49 PM. Click to view previous post history.