Choosing the right material for your kitchen sink is essential to ensuring that you enjoy using it for years to come. Because of this, all Blaupunkt sinks are manufactured of highly robust quartz composite. It consists of 80 % natural quartz sand – the hardest component that makes up granite – and 20 % acrylic resin. The surfaces of the sinks are slightly rough, but not porous – they feel like stone, yet warm.