Save your hair from heat

Using heat on your hair is a great way to get it to take the shape you want. Unfortunately, blow-drying, flat ironing, and curling can all wreak havoc on your hair, unless you take some steps to do it right. By heat styling your hair correctly and taking some extra steps to keep your hair healthy, you can achieve the style you want with minimal damage to your hair
Heat Styling Your Hair
Choose a high-quality straightening or curling iron.The material your iron is made of can have a major effect onyour hair. Inexpensive irons are often made with metals that fail to heat evenly. These irons can actually burn your hair.choose a higher-quality straightening or curling iron made from one of the following materials:Ceramic,Tourmaline,Titanium

Choose the right size iron for your hair to help minimize damage.In general, a 1 inch (2.5 cm) iron is the most versatile choice for hair of medium length and thickness.
If your hair is short, choose a smaller iron.If your hair is very thick or long, opt for a larger iron. This will also speedup the time it takes you to straighten your hair.To achieve ringlet curls, use a smaller curling iron. To achieve loose waves, use a larger curling iron.

Use a heat protection product priorto using heat tools.Purchase a heat protectant that contains both humectants (like panthenol and propylene glycol) and silicones (like amodimethicone and dimethicone). Together these ingredients can lock inmoisture and insulate your hair from heat. Work this product through your hair before heat styling.If you have fine/thin hair, choose a heat protectant spray.If you have thick/coarse hair, select a heat protectant oil, cream, or lotion.

Dry your hair on low until it is no longer damp.Set your blow dryer to its lowest setting. Make sure your hairis completely dry before straighteningor curling it.If your hair is thick, you will need to divide it into sections. Start with 4 sections. If the sections are thick, further divide your hair.

Adjust the temperature based on thethickness of your hair.You can avoid damaging your hair by using the lowest setting that works for your hair. If possible, choose an iron that has a digital temperature control, as opposed to just low, medium, and high settings.Temperatures ranging from 175 °F (79 °C) to 400 °F (204 °C) will work for most hair types.Start at 175 °F (79 °C) and gradually increase the temperature if your hairis not straightening or curling to your liking. If you have coarse, thick hair or resistant hair and you're using a low setting, you will likely need to go over your hair more than once with the flat iron. If you're using a curling iron at a temperaturethat is way too low for your hair's texture, you will likely need to let it sit for longer than 3-5 seconds to ensure that the curl is as tight as you desire.Avoid setting your iron higher to 400°F (204 °C).*.Larger irons are more likely to have temperature controls. If yours doesn't, check the box it came in for its max heat.6Heat your hair in small sections.To minimize damage, you want to curl/straighten your hair a little bit at a time. Using small sections allows you to maintain heat contact for shorter intervals. As a general guideline, you should never leave a heat tool against your hair for longer than 3-5 seconds.[6]7Iron each piece of hair once.You may think you need to run your curling/straightening iron over your hair several times. This is not the right method, and it can really damage your hair. If you are using thecorrect temperature and dividing your hair in small enough sections, you should only need to run the iron over each piece one time.