The blaze started in the ink storage facility adjacent to its print plant.
According to a spokesman for International Greetings, Scandinavian Design's parent company, the fire was started by an accidental "working incident".
There were no injuries from the blaze, which started late last Tuesday (10 May). Eight fire crews tackled the fire.
"None of the main print plant was damaged and the business and customer service will not be affected," said the spokesman.
An investigation is being carried out by the fire service into the exact cause of the fire. The factory is situated on Pengam Road in Aberbargoed.
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