Yes and no.mine would take but it would take longer than the regular time. Stylist would leave it in longer and repeatedly work it through. I know now my hair is lopo which is chemical resistant. Needless to say I usually had horrible scalp burns and scabs. Sometimes my hair would stick to my scalp in the scab and I would have to peel it off. Horrible memories!!!! I would still have to blow dry or rollerset or wrap my hair

Now I have a cousin who relaxers never took in her hair. She would sweat and it would all curl back up like she never relaxed it. People were always oohing ahing over her hair but She hates curly hair. Last time I saw her she had done BKT and it looked like it didn't take either and her hair was dry.