When I'm planning to straighten my hair, I always start by pre-pooing. I usually end up straightening on a Friday night after work, so to save time I do this by wearing a shower cap with a thick winter hat over it for 30 min to 1 hour while eating dinner and getting all of my supplies ready to do my hair.
I shampoo with a sulfate free shampoo. (Shea Moisture Shea Butter Moisture Retention Shampoo)
I condition with a cheapie conditioner to detangle. (Suave Tropical Coconut Conditioner) This is what my hair looks like after rinsing:
I then use a dime size amount of leave-in conditioner ( that is either a liquid or has a thin consistency) for each half of my hair. (Kinky Curly Knot Today)
My blow dryer has 3 air speed settings (low-medium-high) and 3 heat settings (cool-warm-hot). I blow dry on medium heat with the lowest air speed. Depending on how I feel, I may use a blowdryer with a comb attachment, or use the round brush technique to stretch out my hair during the blowdrying session.
Between the blowdrying and flat ironing step, I apply a heat protecting serum. (GVP Silk Infusion or Fantasia IC Heat Protecting Serum).
I then part my hair into 4 sections, take one section and begin to flat iron my hair in small, 1-inch sections. I set the temperature on my flat iron to anywhere from 360-400 degrees.
The final step is to use an anti-humectant to lock in the moisture that's already in my hair, and block out the moisture from the air. This is a KEY STEP in preventing frizz and keeping the hair from reverting. (Aveda Brilliant Anti-Humectant Pomade)
The final result:
To prepare my hair for bed, I start by parting my hair from ear to ear. I comb back the front section of hair as if i'm going to make a high ponytail at the top of my head, then I take that section and roll it into a large flexirod. Next I gather the back section and comb it up to the top of my head and set it with a flexirod. I use the 7/8" purple flexirods:
Here is what my hair looks like with the flexirods in:
I then tie a mesh wrap around my head and cover it with a large triangle wrap cap to sleep.
When I wake up, my hair has a nice, loose curl to it. With my nighttime routine, and applying a little bit of oil and the Aveda Brilliant Anti-Humectant Pomade on my hair every couple of days, my straight hair lasts about 2 weeks.