The fire was reported at 5pm on the evening of the 24th of September at a site off Grove Lane in West Bromwich, which is currently being demolished to make way for the new hospital.
The watch commander at Smethwick fire station, Andy Shakespeare, stated that the fire burned for 90 minutes before firefighters managed to put it out.
The firefighting crews were on the scene until about 8pm and used a Bobcat bulldozer to sift through the rubbish to make sure that the fire was extinguished.
According to Mr Shakespeare, there was about a tonne of old ink cartridges which had been set on fire along with some other rubbish.
The fire crews left the scene at about 8:10pm and handed it over to the on-site security team. It was not reported why and how the ink cartridges came to be at the site.