Saturday, 14 January 2017

Living with Tetenal Eukobrom AC

Tetenal new Eukobrom AC is proving to be a delight to work with. I did not realise how much of a irritant the smell of the developer was until it had been removed from the equation. I no longer have developers nose where the smell lingers long after I have left the darkroom. 

In an early article on this developer I had a couple of questions: Personally the main questions yet to be resolved are its keeping qualities and whether or not the image will be warm when the developer starts to deplete. One of these has now been answered, that is it's keeping qualities. I have been using it in my slot processor, at the end of each print session I leave the developer in the slot and cover it with the lid. The amount of time between each print session varies a lot from days to weeks sometimes months.

Slot processor
 Two things have come to light. If you leave the developer in the slot you should give it a stir before you start using it again. The active ingredient can separate out dropping to the bottom. I was caught out thinking that the developer had come to the end of it's working life because it had been left for two weeks. Something I did regularly with Ilfords multigrade without loss of usability.

Something else I have not experienced before was a black and white crystalline substance on top of the stop bath. It was a very heavy build up making it difficult to remove the top off the stop. The stop it's self was clear and still at the level it had been left at, turning out to still be working even so I changed it. This maybe an interaction with the vitamin C - something to keep an eye on.

The other question about the warming of the prints as the developer depletes still remains unanswered. This due to the fact I have not processed enough prints with the fresh developer. Once I notice I'll let you know.

Finally I have used this developer with a number of makes of paper now - RC and FB, natural, warm, cool tone and tinted papers - With great results, so if you have not tried it yet, do so! you can get it in 250 ml shots which is More than enough to get a feel for the way it works and looks.

Technical Data:

Developer Tetenal Eukobrom AC, paper Kentmere RC gloss. 

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