How to Use a Flat Iron, Waving Iron
Flat irons come in a variety of shapes: large and flat or smaller and finer. The object is to smooth and finish the hair. They are designed literally to iron-out stubborn ends and give a glossy, smooth finish.
The larger irons are for long straight locks. The small irons are for shorter styles to give straightness plus a softening curve at the end. To use, work section by section and slanting at the roots, slide the iron down the hair shaft, turning ends under if desired.
Watch The Video on how to do it yourself
The waving iron was invented by Marcel Grateau in the eighteenth century. Learn How To Use Waving Irons in the below video
The technique of waving hair with the iron was called ondulation and it allowed natural looking movement to be formed. This method of applying waves took expert skills and proficient hairdressers were much in demand to produce "waves a la Marcel".