Hair care chemical emissions study (IMAGE) Purdue University Caption Within a residential archiectural engineering laboratory, Purdue researchers studied how various hair care products can release chemicals that linger in the air after use. Credit Purdue University photo/Drew Stone Usage Restrictions No restrictions. License Public Domain Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.