When I straighten, I use a leave-in conditioner then blowdry my hair while brushing, combing, or fingercombing. Once dry, my hair is huge and puffy and looks like a lion's mane. Then I smooth some jojoba oil through my hair and straighten it in small sections with a wide-barrel curling iron. I usually add a little more jojoba oil after ironing too.
Faith, 3Aish redhead
Mama to two wild superheroes and a curly-headed baby boy
Unfortunately, your guess is as good as mine. Pre-curl embracing, the only way I could get somewhat straight, non-frizzy (which is a bit generous) hair was to first blow dry completely and then use an iron. I never could figure out a way to get it even semi-straight by letting it air dry. Which should have been a very large clue that my hair desperately wanted to do something else. Good luck!
embracing my inner curl since late Nov 2006
2b/3a (I think?)
color-treated red/brown, medium-textured hair
PJ, currently using Suave citrus smoothie, B2B pom cond, GF C&S leave-in, AG re:coil, LOOB, HE SMU, Jessicurl HCC, CC, AIS
I can get my hair really straight with a round, boar bristle brush. First I apply a leave-in and then some Phystodefrissant. I blow dry with just a vent brush until it's mostly dry, just a little damp. That's when I begin blow drying in sections with my round brush, which smooths my hair out. Usually doing this prevents me from needing any type of finishing step, no serums, no flat iron. Honestly doesn't take me much more time that diffusing curly.
I do what Botticellicurlygirl does except i don't use a leave in and i begin to blow dry with the round, natural bristle brush when it's slightly wetter than damp. Phytodefrissant is great. i also don't usually put anything else on my hair to finish.
When my hair begins to feel dry, it's also kind of big and puffy. I find that i have to keep going through it with the brush and dryer a few more times and then it gets smooth and shiny.