UmSumayyah
Well-Known Member
Here's some more motivation for all you "no heat" challengers. 
Before styling hair iwith a curling iron or heated rollers, it's important to dry it throroughly, according to a study in the International Journal of Cosmetic Science. Even then, some damage is probably inevitable. When Yash Kamtath, research director of the Textile Research Institute in Princeton, NJ, treate4d dry hair with a curling iron, he observed microscopic cracks in the fibers.
Thermal treatment on wet hair had the same effect, but in addition, the steam caused bubbling and buckling of the cuticle. "Wet hair swells and deforms more, and bending the fiber under this condition can cause damage," Kamath says. The smaller the diameter of the curling iron or roller--and thus the greater bending of hair--the higher the extent of injury. Kamath recommends staying within the manufacturer's specified time frame and rolling hair gently, not tightly. Flatirons generally cause more damage than curling irons because they heat hair at a higher temperature, he adds.
Before styling hair iwith a curling iron or heated rollers, it's important to dry it throroughly, according to a study in the International Journal of Cosmetic Science. Even then, some damage is probably inevitable. When Yash Kamtath, research director of the Textile Research Institute in Princeton, NJ, treate4d dry hair with a curling iron, he observed microscopic cracks in the fibers.
Thermal treatment on wet hair had the same effect, but in addition, the steam caused bubbling and buckling of the cuticle. "Wet hair swells and deforms more, and bending the fiber under this condition can cause damage," Kamath says. The smaller the diameter of the curling iron or roller--and thus the greater bending of hair--the higher the extent of injury. Kamath recommends staying within the manufacturer's specified time frame and rolling hair gently, not tightly. Flatirons generally cause more damage than curling irons because they heat hair at a higher temperature, he adds.
