I am using beginner watercolors(camel artica – https://www.flipkart.com/camel-artist-water-colour-cakes-18-shades/p/itm104cee3752fa1). Paper 60% cotton. when i apply light washes the paint behaves nicely. But when i apply a less dilute paint for darker look it ends up being loose after drying(loose as in activates it water is reapplied for a second wash and comes off if touched).