How long do they have to heat?
167798
No more than 5 minutes. They are very fast to heat and have a little indicator strip to tell you when they are ready. I highly recommend them. I have had no problems with them unrolling. As with most rollers, heated or not, it is trial and error. I find the less hair rolled in each section the better. I am using them for the dance club that I run and find them quick and easy to use on hair of all different thicknesses and lengths. Hope that helps you.
167799
Not very long, and I found it difficult to use because it kept unrolling and wouldn't stay put. I wouldn't buy it if I had to do it again. It was a big waste of money.
1414577
I could use them for about 40ish mins before they got too warm for my tastes.
721349
You can soak them in water for several hours or you can cover them with water and nuke them in the microwave (my choice) for about 5 minutes and they will be ready to use. Enjoy!!
625408
I have to say I am so happy with this purchase. It takes approximately about 1 hour to 1 1/2 hours to heat.
753602
They take a while. I've never timed them, but I'd guess about 10 min. to get really hot. I usually turn them on, do a few things around house, and then go back and put them in. I have thick, straight hair, so I have to leave them in quite a while, too. (Until cool, about 10 - 15 min.) But the curls hold well as long as I start with hot rollers and let the curls set.
1110340
I put them in cold water, bring to a boil, then turn down (half-heat) for 20-25 minutes. You can also start them at night in crockpot on low and they will be hot and ready in the morning.
153462
If you cut one in half, I think 10 minutes is accurate. A whole one, approximately 15-20 minutes. They actually melt pretty fast.
1515530
I have set these up in the broiler for 5 minutes. Which was well over 450 degrees but not for a long time. Hope that helps a little.
2124644
They stay pretty hot for a couple hours or so. Once they cool, you reset them by boiling them for a few minutes. Its actually pretty cool to watch the crystals forming when you click them.
2124649
They do not stay warm long. Actually they really never get "hot", you get about 15 minutes of warm as long as you are constantly kneading them. After about 30 minutes there's almost no heat at all. Activation is another 30 minutes of boiling water and waiting for them to be "completely" fluid again.
700671
3 minutes. They are instant heat and I love it! These rollers are ecellent product. as businesswoman I am totally satisfied!!!
702293
No, they go to one temperature. They get pretty hot after just a few minutes so if you just want them warm, I'd say leave them in for about one-two minutes. Hope that helps!
825652
I've only put them in the microwave for short amounts of time (less than 4 minutes) but they do not get hot during that time.
191978
You leave them in the red case just like you received them, and plug them in until they're heated through, about 10+ minutes.
2161298
No. I let them heat up at least 5-10 minutes, though, because I have a lot of hair.
765250
Not sure. You would have to cook them longer. They may char on the outside before heating through.
213230
according to the instructions that came with the kit you can use them to bake up to 400F. To heat cure them you can bake at 350F for 30 min. If used for food use only for food. needs to cure for at least 25 minutes before use. It comes with detailed instructions. :)