In November the handbag-sized title will become larger, have bigger pagination and will carry on-magazine promotions.
Jack was published by I Feel Good (IFG), which was acquired by Dennis Publishing in June, along with Viz, Fortean Times and Leeds Leeds Leeds.
James Tye, managing director of Dennis Publishings computer division, said a production review of the entire IFG portfolio was taking place and that a decision was expected within a week.
Dennis Publishings preferred print suppliers are St Ives Plymouth, Polestar Chantry, Southernprint, Benhamgoodheadprint (BGP) and Wyndeham Heron.
Cooper Clegg chairman Ian Cooper said that there was no reason why the Tewkesbury-based printer could not continue to produce Jack.
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"Sad to see another print company facing financial trouble. The industry is tough, and this highlights the ongoing challenges many are facing. Hope employees and customers get clarity soon."
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