"Old Stock" Graphic Chemical, printmaking products

Polymetaal acquired recently some "old stocks" of printing inks. We do not know the condition of these inks, so we will sell then, without any guarantee, at a reduced price, until end of stock.
We checked the cans or tubes on the outside for leaks and serious damage. We did not open the can to check the inside. If we open the cans, air would come in, which may disturb the content.