Soft nails that break and split - experience has proven that the tip of the nail is the most fragile part which easily breaks and therefore should be strengthened.mavala scientifique k+, innovative formula hardens the nail plate thanks to a scientific active ingredient that improves the cohesion of keratin fibres, principal element composing nails, thus allowing to bond the three major nail layers together.this penetrating aqueous solution hardens soft nails, and avoids them breaking or splitting.how to useremove manicure and any oily film from nails. apply mavala scientifique k+ from thecentre of the nail to the tip only. avoid touching cuticles and skin around nails, to avoid them getting too hard. leave to penetrate for one minute, by holding hands downwards.its application can be followed by a manicure (base coat, nail polish, top coat). use two to three times a week until nails have obtained the desired hardness.then, you may space out the applications.