Firefighters have spent the night tackling a large fire at the Horwich Loco Industrial Estate, off Chorley New Road.
The fire involved a recycling plant, used for manufacturing bottle tops, and a large amount of plastic.
Station Manager Wayne Guffogg said: "Firefighters worked hard to contain the fire to the building involved and stop it spreading to neighbouring businesses.
"We worked with local businesses to re-open the roads on the industrial estate and allow workers to go about their day to day business."
More top news
The first half of the new working week looks settled. Mainly dry, winds light and feeling warm in any sunshine
More cloud and higher risk of showers on Sunday, feeling cooler. High pressure in control into next week with many areas fine and dry.
Generally dry and settled. Cloudier with showers on Sunday.