doblock

Dobleck is a non-Newtonian fluid made from a simple mixture of cornstarch and water. Its name derives from the combination of "double" and "cornstarch," reflecting its unique properties when prepared in equal parts by weight. Typically, the mixture consists of approximately one part water to one part cornstarch, although ratios can vary slightly to alter its consistency.

Dobleck exhibits both liquid and solid characteristics depending on the force applied to it. When gentle pressure or slow movement is used, it behaves like a liquid and flows easily. However, when subjected to quick impacts or forceful tapping, it solidifies momentarily, resisting deformation. This behavior is due to its shear thickening properties, which are characteristic of non-Newtonian fluids.

Dobleck is popular as an educational demonstration of states of matter and fluid dynamics, illustrating concepts such as viscosity and non-Newtonian behavior. It is also a common sensory activity for children, offering a tactile experience that emphasizes the difference between solid and liquid states within a single substance.

The preparation process involves thoroughly mixing cornstarch and water until a uniform, dough-like consistency is achieved. Dobleck is not a stable material over long periods; it tends to dry out or separate if left unmixed for extended durations, requiring occasional stirring.

While primarily used as a science experiment or play material, Dobleck is generally safe for handling and is considered non-toxic. Its unique properties continue to fascinate both educators and enthusiasts, serving as a tangible illustration of complex scientific principles in a simple, accessible form.