Vitreous detachment is the separation of the eye's internal clear gel (vitreous) from the eye wall or retinal. A ...
Artistic Wire craft wire is considered dead soft on the wire hardness scale, because it is bendy and pliable. This is a round (or twisted!) copper wire that has been colored with an enamel coating. This process has been developed to resist tarnishing, chipping, or peeling.
Scratch hardness is the measure of how resistant a sample is to fracture or permanent plastic deformation due to friction from a sharp object. The principle is that an object made of a harder material will scratch an object made of a softer material. When testing coatings, scratch hardness refers to the force necessary to cut through the film to the substrate. The most common test is Mohs scale, which is used in mineralogy.