English to Russian Marketing Cosmetics, Beauty

Compact, non-volatile bleaching powder, ideal for fast and powerful super-lightening action. Mixed solely with ACTIVE USE, it gives lightening of up to 7 shades.

Please, note that the word "ACTIVE USE" is in capital letters in the source text. Even after a few hours of background research I am still not sure how to translate the "Mixed solely with ACTIVE USE".

Thank you!