Fig 5. Comparison of whiteness loss from 40°C (n = 19) with cold express cycle (n = 19).
Error bars represent the standard deviation.
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.