Small quantities of camphorquinone, typically less than 0.2 wt%, are sufficient to initiate the polymerization process when the composite resin is exposed to blue light.

ANSI/ADA Specification No. 12 requires that the material should reach a doughlike consistency in less than 10 minutes from the start of the mixing process.

Higher temperatures generally speed up the chemical reactions involved in the setting of gypsum products, leading to a shorter setting time.

Knoop hardness test - Diamond of rhombic shape (The long axis of indentotion is measured)
Vickers (Diamond pyramid test) - Diamond of square base shape (The diagonal length of the indentation is measured)
Rockwell  - Diamond of conical shape (The penetration depth is measured)
Brinells  - Steel ball (The diameter of indentation is measured)

The Knoop hardness test is used to obtain the values for both exceedingly hard and soft materials. The
hardness value is independent of the ductility of the material.

ZnO is a filler in Gutta Percha, and it improves the strength and flexibility of the material.