Firefighters were called to Pen-y-Fan Industrial Estate last night, February 2, just after 9pm.
Crews from Aberbargoed and Abercarn attended the fire, in a print room within one of the industrial units, and used two breathing apparatus and one hosereel jet to put out the blaze.
A spokesman for South Wales Fire and Rescue Service said the fire was extinguished by 9.41pm and that a thermal imaging camera was used to check for “hot spots”.
The cause of the fire was accidental.