Swiss cheese-maker Ernst Waser lets the whey drain off from the skimmed cheese curd through the cheesecloth. GAETAN BALLY/KEYSTONE /Landov hide caption toggle caption GAETAN BALLY/KEYSTONE /Landov The Salt Waste Whey? Some Say No Way. January 13, 2012 Over the years, dairy producers and food scientists have found a multitude of uses for whey, the byproduct of cheese-making. Now, German scientists have found a way to turn it into plastic.