Gast
I have had spots scattered throughout the film on several occasions. In A49 and always in 1:3 working solutions prepared from a concentrated stock solution for single-use development.
The quality of the development was fine in terms of sharpness, density, etc., but the negatives show finely distributed specks. So far, I have only noticed this with batches that were over six weeks old.
I always prepare the A49 as a concentrate in roughly the specified amount of water.
MirkoBoeddecker
Mattes,
Who told you that you can prepare the A49 using half the amount of water as a concentrate?
Have you ever tried preparing it according to the instructions?
Because if, for example, Part A hasn’t been fully dissolved before Part B is added, insoluble residues remain, which can cause exactly that.
How do you store your stock solution?
In glass bottles with Protectan, or in plastic?
Regards,
Mirko
Gast
Hello,
Mr Boeddecker is quite right; moreover, the instructions clearly state that A49 has a shelf life of four weeks, not six weeks or more.
Some specialist books even recommend not using a batch for longer than two weeks. It’s a shame, but understandable, that it is no longer economically viable to offer A49 in 300 ml packs.
Werner
Gast
Hello!
I’ve been using A49 successfully for several months now. However, older batches (stored in glass bottles) show brownish deposits on the inside of the bottle – I imagine these might damage the emulsion (resulting in spots); if that were to happen, I’d simply filter it (using a coffee filter).
Roman
