The German client was not amused.
"They reacted strongly, and wanted an explanation of how this could've happened," said Lars Lundin to local newspaper Hallandsposten.
"I've given the client my personal apologies, as well as the company's. Today it looks as though we'll be able to keep them as clients."
Lundin was initially loath to disclose the nature of the drawings discovered on the rolls, describing them only as "symbols offensive to other people" when Hallandsposten first wrote of the matter on Friday.
However, an employee at Stora Enso soon contacted the newspaper and revealed that the drawings were in fact swastikas.
"I think they're incredibly embarassed that the company in Germany reacted. Those who don't know about this should definitely be told," said the anonymous employee to Hallandsposten.
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The company's senior safety ombudsman wants to keep the matter within the company, according to Hallandsposten, and describes the incident as "general ignorance".