how to apply whitening mask?

i know this may be a stupid question but i don’t know how to put it on..? do i just put it on my face overnight then wash it off the next morning or how many minutes do i need to put it on?????? my mom threw away the instruction paper & box =(

can i ask YOU a question?! whats a whitening mask? does it like make your skin whiter? and if so why do you want that? please and thank you
-Tess
p.s.
ok i looked it up and it looks like you keep it on for 10 minutes. and your supposed to do it 2-3 times a week.

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