Mirror gloss surface

If better surface roughness and geometrical accuracy is required, such as for mirror gloss surfaces roughness values of about 0.1 p and for optical purposes when 0.04 p is necessary, lapping can be used for normal steel grades to flatten the surface. 

Even more extremely, one can realize the influence of the smoothness of the pigment surface, if one looks at applications with vacuum metallized aluminum pigments manufactured from vacuum metallized films. These pigments have a foil- or mirror-like surface, achieving extra brilliant and high gloss effects. They are therefore... 

A solid electrode, in comparison to a mercury drop, usually requires very careful pretreatment. The electrode surface should be clean and polished on a very wet pad to mirror gloss. This can be done using abrasive powders (or their suspensions in water), such as diamond and alumina, of various particle sizes. Depending on the actual state of the surface the polishing should start with the appropriate size of the abrasive material, followed by polishing with smaller par-... 

The sandwich process extends the scope of injection moulding and (as an instance of this) makes it possible to provide fibre-filled mouldings with surface finish of very high gloss. It is applied to produce reflectors for headlights in motor vehicles—where the substrate is heavily filled and resistant to distortion by heat yet the surface is mirror-like. 

The objective measure in this case is the intensity and kind of reflectance. Only for highly polished metal mirrors the reflectance may be nearly total if the specular reflectance is almost nil, the surface is totally matt. In between, the material is glossy or sheeny. Gloss is the reflectance of a surface responsible for its lustrous appearance, commonly at maximum near the specular direction, i.e. the direction of pure mirror reflection. 

The optical properties of ceramics are useful in the ultraviolet, visible, and infrared ranges of the electromagnetic spectrum, and one key quantity used to describe the optical property of a material is the refractive index, which is a function of the frequency of the electromagnetic radiation. Other quantities used to characterize optical performance are absorption, transmission, and reflection these three properties sum to unity and are also frequency dependent. The last three properties govern many aspects of how light interacts with materials in windows, lenses, mirrors, and filters. In many consumer, decorative, and ornamental applications, the esthetic qualities of the ceramic, such as color, surface texture, gloss, opacity, and translucency, depend critically on how light interacts with the material. 

In the classical polishing process the surface is smoothed to a mirror level, so that specular reflections can occur on opaque surfaces and be perceived as luster or gloss. In case of transparent materials, such as lenses, polishing minimizes the amount of incident light physically scattered by asperities and small defects. In both mentioned... 

Luster l9s-t3r [MF lustre, from 01 lustro, fr. lustrare to brighten, fr. L. to purify ceremonially, fr. lustrum] (ca. 1522) n. (1) Type of surface reflectance, or gloss, where the ratio of specular reflectance to diffuse reflectance is relatively high, but not so high as that from a perfect specular reflector (mirror). (2) Another term for gloss. 

Related to specular gloss is distinctness-of-image (DOI) gloss. A perfect specular reflector is a perfect mirror. If a surface has perfect diffuse reflection, no mirror image can be seen. At intermediate stages, the image is more and more blurred as the ratio of specular to diffuse reflection decreases. Often one sees both blurring and distortion. 

Gloss The gloss of a surface is its ability to reflect light specularly. There is variation in glossiness, from matt through eggshell to mirror, whose value is determined by the method of test. 

Gloss describes the mirror-like property of a coated surface and is defined as the percentage of the Hght that is reflected from the surface at an angle equal to the angle of incidence, in comparison with a Standard surface. 

The mold surface has the greatest influence on the molded part surface and thus on the gloss (dullness) because the plastic reflects a mirror image of the surface contour of the mold. 

---