Hi naca, the revlonissimo may be a little different in the way they say what the products are called over here,
are they the tint in super blondes to lift 5 levels ?
platinum blonde is 1002x which is platinum blonde is this what you use ?
then there is a 1031x which is a beige blonde did you want to put the beige blonde on instead ?
it has the number 1 and number 3 in the code numbers it must have some ash in it and also some gold too ,
eg 1= ash in England. Is your country the same colour codes ?
and 3 = gold
I have never used the beige colour in revlonissmo before,
I would do some test pieces first
iI think it will be ok on the roots for a slightly darker tones (not as bright )
but it may be too strong for the ends and cause breakage as its a super lift with 12/%
you could perhaps spray it with water at the end of the process and comb it all through
or perhaps find a matching biege blonde ordinary tint in 10/31 for the ends and do a colour bath to put some tone in ?
also as nora says for the ends do some test pieces first