The firm has been running for 200 years

Members of the National League of Blind and Disabled (NLBD) at the council-owned BlindCraft plant backed industrial action by four-to-one.

Talks will be held on Friday between union leaders and Edinburgh City Council about the future of the firm, which has been struggling with debt.

The factory makes goods including beds and windows for local authorities and private firms across the UK.

They have no confidence in the current management of the factory Steve McCool Union organiser

The 200-year-old business, based in the capital's Peffer Place, is operating under a council-approved rescue plan after it ran up debts of �2m.

But Steve McCool, Scottish organiser of the Iron and Steel Trade Confederation, which runs the NLBD, said the workers were "angry and worried" about the future performance of the factory.

Mr McCool said: "The message from the workforce is clear - they have no confidence in the current management of the factory and want the council to ensure that a new management climate is created which allows an agreed strategy for the plant to be implemented."

About 70 of the 120-strong workforce have physical and mental disabilities.