The use of blue zircon dates back to the Middle Ages. when archaeological evidence suggests it was used as early as the 6th century. In spite of the fact that zircon is one of the oldest minerals on Earth. with samples dating as far back as 44 100 million years. it is likely that it was discovered even earlier.

Yes, polypropylene is an addition polymer. It is formed by the polymerization of propylene monomers (propene) through a process known as addition polymerization or chain growth polymerization. In this process, the double bonds of the propylene molecules open up and link together, forming long polymer chains without the elimination of smaller molecules, such as water. This is characteristic of addition polymers, which contrast with condensation polymers where the polymerization process involves the elimination of small molecules. Polypropylene is widely used due to its versatility, resistance to chemicals, and high melting point, making it suitable for a wide range of applications including packaging, textiles, automotive parts, and reusable containers.

Titanium dioxide. a popular choice for pigmentation in industries ranging from paint to cosmetics. typically requires the use of high-speed dissolvers and dispersers during the pre-mixing process. The first step is to add the carrier. which aids in stabilizing the pigment. Next. the titanium dioxide should be slowly added while continuously mixing to achieve thorough dispersion and prevent clumping. Mixing should continue until a smooth and consistent texture is achieved. As a safety precaution. please be aware that inhalation of titanium dioxide can have harmful effects on the lungs.