The Basic Black Nail Polish Base is a fantastic and versatile black nail polish base that has many applications. One such function is this nail polish base is perfect for darkening the colour of commercial nail polishes you already own. Another function is that this is the perfect base for creating your own homemade DIY nail polishes from scratch as well as fun projects like jelly nail polishes. This nail polish base is vegan, cruelty-free and 10-free.