Could you straighten my hair with the straightener?
Stress 'PIA-stra'. 'Lisciare' = li-SHIA-re — to straighten.
Ask this when you want your hair straightened as part of your styling. 'Piastra' (iron/plate) is the standard Italian term for a hair straightener.
'Piastra' = flat iron/hair straightener (literally 'plate'). 'Lisciare' = to straighten (from 'liscio' = straight/smooth). 'Potreste' is the conditional plural of 'potere' — polite indirect request. 'Potrebbe' (singular) is for addressing one person formally.
Vorrei i capelli perfettamente lisci.
I'd like perfectly straight hair.
Stating the desired outcome.
Usate la piastra o il phon?
Do you use a straightener or a hairdryer?
Asking about technique.
Quanto dura la lisciatura con la piastra?
How long does the straightening with a flat iron last?
About durability.
Hair straightening is hugely popular in Italy, particularly in regions where humidity makes naturally wavy or curly hair difficult to manage. 'Lisciatura brasiliana' (Brazilian blowout) and 'cheratina' (keratin treatment) are sought-after semi-permanent straightening options offered in Italian salons.