misspelledsearch.com:

glossy cardstock

information page

If you cannot find the information you are searching for on this page, we suggest searching Google with the correct spelling "glossy cardstock":

See also List of optical topics.

Gloss is an optical property, which is based on the interaction of light with physical characteristics of a surface. It is actually the ability of a surface to reflect light into the specular direction. The factors that affects gloss are the refractive index of the material, the angle of incident light and the surface topography.

Gloss can be said as a view of material appearance. Materials with smooth surfaces appear glossy, while very rough surfaces reflect no specular light and therefore appear matte. Gloss is also expressed as lustre or sheen in certain fields of application.

Qualitative and Quantitative View of Gloss

Surface gloss is considered to be the amount of incident light that is reflected at the specular reflectance angle of the mean of that surface. So, specular gloss is proportional to the reflectance of the surface.

The Fresnel formula gives the specular reflectance, R_s, for an unpolarized light of intensity I₀, at angle of incidence i, giving the intensity of specularly reflected beam of intensity I_r, while the refractive index of the surface specimen is m.

The Fresnel equation is given as follows :

Surface Roughness

Surface roughness in micrometer range influences the specular reflectance levels. The diagramme on the right depicts the reflection at an angle i on a rough surface with a characteristic roughness height h. The path difference between rays reflected from the top and bottom of the surface bumps is:

When the wavelength of the light is λ, the phase difference will be:

If is small, the two beams (see Figure 1) are nearly in phase and therefore the specimen surface can be considered smooth. But when , then beams are not in phase and through interference, cancellation of each other will occur. Low intensity of specularly reflected light means the surface is rough and it scatters the light in other directions. If an arbitrary criterion for smooth surface is , then substitution into the equation above will produce:

This smooth surface condition is known as the Rayleigh criterion.

Gloss Measurement

Specular reflection is measured with a specular glossmeter. Unpolarised white light is concentrated by a condenser lens onto a field aperture, which is located in the focal plane of the source lens. The reflected beam at the surface is later collected by the receptor lens. The intensity of the beam is then measured through a photodetector.

The common angles of incidence for gloss measurement are 20°, 60° and 85°. Low gloss surfaces are recommended to be measured with 85° settings.

The typical standards for gloss measurements are ASTM D 2457, DIN EN ISO 2813 and DIN 67530.

References

• Meeten, G.H., "Optical Properties of Polymers," Elsevier Applied Science, London, 1986, pp. 326 - 329. ISBN 0-85334-434-5

This glossy cardstock index site has been developed to help wayward users find the information they are looking for, no matter how they are mistakenly spelled or mistyped. This site is designed to help users find glossy cardstock information for the following query variants:

glossy	glossy cardstokc	glossy cardstcok	glossy cardsotck
glossy cardtsock	glossy carsdtock	glossy cadrstock	glossy cradstock
glossy acrdstock	glossy cardstoc	glossy cardstok	glossy cardstck
glossy cardsock	glossy cardtock	glossy carstock	glossy cadstock
glossy crdstock	glossy ardstock	cardstock	gloss cardstock
gross cardstock	glos cardstock	gros cardstock	groes cardstock
glous cardstock	grous cardstock	gloess cardstock	groess cardstock
glouss cardstock	grouss cardstock	gloes cardstock	gloesie cardstock
groescy cardstock	glousy cardstock	gloscie cardstock	glousie cardstock
glouscy cardstock	grousy cardstock	groscie cardstock	glossie cardstock
gloescie cardstock	grouscy cardstock	gloessi cardstock	glocie cardstock
glosie cardstock	glouscie cardstock	gloecy cardstock	groessi cardstock
gloessy cardstock	grossie cardstock	gloucy cardstock	gloussi cardstock
groessy cardstock	grosie cardstock	gloessie cardstock	groussi cardstock
gloussy cardstock	gloscy cardstock	groessie cardstock	gloesi cardstock
groussy cardstock	glocy cardstock	gloussie cardstock	glousi cardstock
gloesy cardstock	groscy cardstock	groussie cardstock	gloescy cardstock
groesy cardstock	grocy cardstock	grossi cardstock	grosi cardstock
glosy cardstock	glossi cardstock	glosi cardstock	grossy cardstock
grosy cardstock	roscy cardstock	rocy cardstock	loscie cardstock
roscie cardstock	lossie cardstock	locie cardstock	losie cardstock
lossy cardstock	rossie cardstock	rosie cardstock	loscy cardstock
locy cardstock	loesy cardstock	roussie cardstock	loescy cardstock
roesy cardstock	loesie cardstock	roescy cardstock	lousy cardstock
lousie cardstock	louscy cardstock	rousy cardstock	loescie cardstock
rouscy cardstock	loessi cardstock	louscie cardstock	loecy cardstock
roessi cardstock	loessy cardstock	loucy cardstock	loussi cardstock
roessy cardstock	loessie cardstock	roussi cardstock	loussy cardstock
roessie cardstock	loesi cardstock	roussy cardstock	loussie cardstock
lousi cardstock	rosy cardstock	rossi cardstock	rosi cardstock
losy cardstock	lossi cardstock	losi cardstock	rossy cardstock
giosy cardstock	glosys cardstock	glsosy cardstock	golssy cardstock
lgossy cardstock