Update: October 8, 2021
Researchers are free to use the data in this collection for the study or academic purposes. Use for commercial purposes is not allowed.
There appears to be a time lag between the formation of comedo in the dermis and sebum at the subcutis due to the difference in color.
The comedo formation in the dermis is poor, but the sebum is firmly formed in the subcutis.
It is seen a firm sebum accumulation at the subcutis.