Journalists at the Johnston Press-owned South Yorkshire Newspapers are planning to take a further ten days of continuous strike action over pay and conditions bringing the total number of days to 13.
The chapel is pushing for a 5 per cent across the board pay rise to bring their salaries in line with other Johnston newspapers across the country but say the figure is open to negotiation with management.
However the company has said it will freeze pay while under the threat of strike action.
Senior qualified staff on SYN weekly papers can earn less than £17,000, according to the NUJ, whereas in Sheffield they earn £19,000. SYN is currently offering 2.75 per cent.
The strikes are due to take place from 24 July to 2 August unless management offers "constructive talks".
NUJ mother of Chapel Emma Roots said: "The decision to strike was not taken lightly, but chapel members have been united in their anger at poverty pay levels and ever increasing workloads. Our membership ranges from the youngest trainees to a deputy editor in his sixties.
"All we want to do is to be able to produce high quality newspapers and earn a decent living wage. Because our salaries are already so low the offer of 2.75% works out at a rise of just 71p per day for those at the bottom of the payscale."