An exact number will be determined later, he said.
Dunton said the laid-off workers will return once the furnace work is finished. During the layoff, they will be eligible for unemployment benefits and health benefits, he said.
Libbey Glass is currently lobbying Louisiana officials for 10 years of property tax breaks related to a potential $35 million expansion. Company officials have said the expansion will create no new permanent jobs as the project now stands.