All this is so well documented and that's great! I have poker straight hair but I crave for curls and more volume all the time. I also use flat iron to curl my hair but the difference is - I'm NOT able to do this good job. But it is also damaging my hair so I'm trying some more ways to curl my hair without heat which I read here http://thelifesquare.com/how-to-curl-your-hair-85...And I must say one of them worked for me really well.
Most mid-grade and high-end hair straighteners come with plates that are 1” or 1.5”. If you are looking at one that is 2”, 2.5”, or even bigger, steer clear immediately. Not only does larger plates make it easier for you to accidentally over-iron (and seriously damage) your hair, but they also make it more difficult to get all of the way down to your roots. For anyone with type 3 or type 4 hair, trying to use a large-sized flat iron would be far more trouble than it’s worth.
Available with either ceramic plates (good for all hair types) or titanium ones (choice for curly, thick, and coarse textures), this innovative styler features touch sensor technology that lowers the heat when it's not being used, then automatically brings it back up to temp as soon as it's touched. Translation: No more waiting for your iron to heat up in between passes. Use it for smooth and sleek styles, or take advantage of the round brush-esque attachments to create more of a bouncy blowout effect.