Flatness
Print beds need to be flat throughout printing to avoid running into errors. Glass has a high modulus of elasticity and is thermally stable. Therefore, it remains flat and will ensure the bed’s leveling remains consistent throughout.
Smooth Finish
Most of the users want the bottom of their prints to be as soft as possible; glass guarantees such a finish, giving a mirror-like, glossy base that cannot be achieved by most bed surfaces.
Thermal Conductivity
There are instances where the build platform needs to be heated to prevent warping and to improve print quality. thermal conductivity means you have a thermally stable platform that will not be affected by sudden rises or drops in temperature.
Durability
Durable glass like tempered glass will not easily shatter or crack when exposed to high strains because it is manufactured to be more tolerant.
Scratch Resistance
Beds like acrylic can easily get scratched and become a nuisance when printing. However, tempered glass tends to be scratch resistant and is not susceptible to Abrasion or Chemical damage.
