Penn State professor Greg Ziegler holds up a colorant sample Monday in his office at The Rodney A. Erickson Food Science Building.
Penn State professor Greg Ziegler holds up a colorant sample Monday in his office at The Rodney A. Erickson Food Science Building. Phoebe Sheehan psheehan@centredaily.com
Penn State professor Greg Ziegler holds up a colorant sample Monday in his office at The Rodney A. Erickson Food Science Building. Phoebe Sheehan psheehan@centredaily.com