N.H. Code Admin. R. Bar 101.54
"Threading" means a service provided by a master barber, cosmetologist, or esthetician that results in the removal of hair from its follicle from around the eyebrows and from other parts of the face with the use of a single strand of thread and an astringent. The meaning does not include the use of chemicals of any kind, wax, or any implements, instruments, or tools to remove hair.
Source. #14459, eff 1-1-26