The paint is better preserved because air cannot get inside the pouch. You can use every last drop of the paint, there is no waste and no air bubbles which could cause the paint to spill out. With Abstract acrylics, there are no surprises when choosing a colour. There's no difference between the colour you can see from the outside of the pouch and the inside. Abstract is the result of three years of research and development by the Sennelier expert lab team. It is a fine acrylic paint which meets all the stringent quality demands that are a guarantee of Sennelier paints. Its pigment concentration (quite amazing for this segment of the market) gives it a creamy to thick consistency which they've called 'heavy body', along with incomparable covering power. The paste is a pleasure to handle with a brush, a palette knife or straight out of the soft pack. Its ease of application onto multiple surfaces makes it very popular with students, professional painters, street artists and many more creative people. Abstract is composed of 34 single pigment colours among the range's 60 shades.