Do inks expire?

[coolembroideries]

Can anyone tell me if the inks expire? and how can we tell if they are too old besides them drying of course? I bought a package from a guy on ebay and I don't know if the ink is old, I don't want to cause someone a reaction. I got three bottles of Durat and i would hate for those to go to waste but I don't want to use them if they are expired. They are a little thick, so i wonder if I can thin them with anything?
thanks all

Vaness

[Ladyoh]

Someone at Tatstore told me that Duratat has a two year shelf life.

If it is bad, it will smell and or look bad/moldy. If they look good, then I would strain them (fuel strainers found in the camping dept). Then do a test on your wrist. If the inks look/smell good, and there is no reaction, then the only problem you might have is that they may not last as long as they should. I would label them and use them for practice.

Ladyoh