Can a 15 volume developer be used when going darker with FRAMCOLOR 2001 INTENSE?

Due to the cooler tonality of the FRAMCOLOR 2001 INTENSE colors, best results are achieved using a 20 volume developer when going darker.

Due to the cooler tonality of the FRAMCOLOR 2001 INTENSE colors, best results are
achieved using a 20 volume developer when going darker to prevent the over-deposit of
color on fragile or porous hair.