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OSHA
EPA
FDA
None of the above
Can be thermal styled / wet set
Cannot be thermal styled / wet set
Are not considered "bounce back"
Require very low heat when thermal styling
Postiche wigs
Cap wigs
Capless wigs
Usually under-knotted
Vellus
Lanugo
Terminal
Barba
Vellus hair is longer
They are virtually indistinguishable
Vellus hair has pigment
Vellus hair has little/no pigment
Below 7
Above 7
At 7
None of the above
Cause less skin / scalp irritation
More drying to the hair
Contain no lye
Have a lower pH than most Thio Relaxers
Synthetic
Hair with cuticle "turned" in different directions
Human hair, before wig processing
Hair with cuticle "turned" in one direction
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