The South Wales-based company said it had reduced the cost of its waste after gaining the accreditation, in response to requests from its customers.

HSW Print's Emma Marshman, who oversaw the certification process, said: "Certain parts of the process were challenging to achieve. There was more documentation than practical issues."

The £7m-turnover B1 and B2 printer has 84 staff, and is also FSC and PEFC certified.