What is K9 crystal?
K9 crystal is widely used in the field of lighting in China, Chandelier and Pedant light. It is a Chinese Optical Borosilicate Crown Crystal (Optically Clear) with low inclusions and imperfections ideal for use in lenses and prisms, optics and decorative crystal lighting. K9 got it’s name because of it’s 9% lead content. It has good physical properties and can be polished similar to lead crystal, weighing approximately 15 percent less than full leaded crystal having a lead content of only 10 percent. In 1972 the EU ruled that anything less that 24% Pbo (lead) could not be called “crystal “. This isn’t the case anymore (EU Directive 2002/95/EC). K9 crystal offers a high refractive index and high clarity making it a good option for the manufacture of high end chandeliers offering both durability and excellent quality. It is similar to BK7.