Which one of the following ingredients does NOT constitute paint ?

Paint is a complex mixture typically composed of pigments, binders, solvents (thinners), and various additives. Turpentine oil is a traditional solvent or thinner used to reduce viscosity for better application. Poly-hydroxy phenols serve as anti-skinning agents, which are additives that prevent the formation of a surface skin or gelling in the paint container. Titanium dioxide is a widely used inorganic pigment, often called 'titanium white,' valued for its high opacity and whiteness. In contrast, Thiourea is not a standard constituent of paint; it is primarily utilized as an accelerator in rubber production or as an antioxidant in other industrial processes. While paint may contain drying agents or catalysts, thiourea specifically does not belong to the standard formulation of decorative or industrial paints.

Sources

1. [1] https://kids.britannica.com/students/article/paint-and-varnish/276251