The move will allow the Twin Tiers' largest employer to concentrate at Big Flats on more lucrative drug discovery products, said Mark A. Beck, vice president and general manager of Corning Life Sciences.
Beck declined to say how many employees will be affected by the change, which will occur over two years.
Mike Walker, president of Local 1000 of the United Steelworkers of America, said about 50 of the 70 union employees at Big Flats will be affected.
Beck said many of those whose jobs are being shifted to Mexico will be eligible to apply for jobs in other Corning Inc. facilities in the region. Others will be able to retire, Corning spokesman Dan Collins said.
Walker agreed that most of those affected won't be out of a job.