Brazilian Keratin Treatment Is a Revolutionary Treatment for All Kinds of Hair. This Is an Intense Treatment That Leaves Hair Soft, Shiny and Frizz Free for Up to 4 Months. Brazilian Hair Keratin Straightening (Also Called Escova Progressiva, Keratin Straightening, Brazilian Blowout or Bkt) Is a Method of Temporarily Straightening Hair by Sealing the Hair with a Liquid Keratin and Formaldehyde Solution with a Flat Iron. The Brazilian Keratin Treatment Is a Long Term Blow Dry for Hair That Lasts About Three Months. It Is Designed for People Who Have Curly or Frizzy Hair but Would Like a Straighter Appearance. Pioneered in Brazil, the Brazilian Keratin Treatment Is Said to Be Able to Be Performed on All Types of Chemically Treated Hair (Bleached, Hi-Lights, Coloured, Permed, Relaxed or Previously Straightened). It Is Used on Frizzy, Damaged, Unhealthy, Dull and Mistreated Hair. The System Is Said to Eliminate Any Frizz, Unruly Curls and Waves Without Making It Too Flat Like Other Treatments Such as the Japanese Yuko System. The Technique of the Application Is Similar to the Yuko System in a Way That the Straightening Irons Are Used to Close the Product Into the Hair Cuticle, but It's Not as Strong and There Aren't the Problems with Re-Growth as the Treatment Gradually Washes Out Over Time Treatments Last Around 10 Weeks and Repeating the Treatment Every Few Months Will Allow Re-Treatment of the New Growth.