I am brazilian and I do the Keratin,
Liquid keratin for curly hair will soften but wont do much( not 6 weeks)
well try something more like Brazilian Blowout.
whan done by a pro, ( like my self/ with all do respect)
you will have great results..
Its all on a techinique...
how you prep your hair.
how do you separate your hair, ( how hot is the flat irom
all comes into play ...
depending on how much control ( clients wishes) more straight , less staright , waves, bigger curl, or just shine...
check my site Brazilian Keratin NYC - 100% Organic /Done By A Brazilian Specialist Brazilian Keratin NYC - 100% Organic /Done By A Brazilian Specialist