A tomato ketchup-stained work by LS Lowry has been restored ahead of its public debut in Salford.
The oil painting, titled "The Thames at Greenwich," is thought to have picked up the stains in a family home where it has hung since the 1970s.
A spokeswoman for The Lowry arts center said the work "had a light layer of surface dirt [and] two small and very old, ketchup stains".
It will be on show at the center, along with a related drawing, until December.
