What is hollow glass prism

A hollow prism is made using a glass plate with the center part of the prism vacant. This cavity can be filled with gas or other fluids. Thus, a hollow prism is also commonly called a fluid prism. Hollow glass microspheres achieve high Total Solar Reflectance (TSR) levels in coatings. Hollow phenolic resin microspheres are used as raw material to produce SIGRATHERM hollow microspheres. The phenolic beads are first carbonized and afterward graphitized at 2000 °C (3632 °F), turning into graphitize


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