Covering Power

covering power

[′kəv·riŋ ‚pau̇·ər]
(engineering)
The degree to which a coating obscures the underlying material.
(metallurgy)
The ability of an electroplating bath to produce a coating at a low current density.
(optics)
The field of view over which a camera lens can produce a sharp image, frequently expressed as an angle.

Covering Power

 

(also hiding power), the ability of pigmented paints and varnishes to cover a colored surface. The covering power is proportional to the difference in the refractive indexes of the pigments and the film-forming vehicles; it is also dependent upon pigment properties. The greater the covering power, the less paint used per unit of surface. The covering power is determined by visual and photometric methods.


Covering Power

 

in photography, the measure of the effectiveness of silver in darkening, equal to the ratio between the diffuse optical density of the darkening D and the surface concentration of the silver present CAB (in g per sq m). The smaller the silver granules producing the darkening effect, the greater is the covering power (usually from 0.25 to 0.8 sq m per g).

hiding power, covering power

The ability of a paint film to obscure completely any pattern, marks, or color on the surface to which it is applied.
References in periodicals archive ?
Patent analysis as well as discussion covering power sources and vehicle components, emphasizing intellectual property issues.
Siddhartha Raina, GlobalData's Senior Analyst covering Power says: "Saudi Arabia is planning large-scale investment, amounting to a total of around $100bn, which is to be spent within the next 10 years on doubling domestic power generation from the current level of 40,000 MW to 80,000 Megawatts (MW).
GlobalData's Analyst covering Power says that a wind farm's O&M is essential as it contributes to value creation, increases turbine availability and boosts returns.
To facilitate capacity building efforts, the IEA Clean Coal Centre is today launching a Chinese language version of its website to offer a wide range of clean coal study profiles covering power, cement, coking and chemicals.
Approvals were issued at the start of this year to transform and redesign Al Khawaneej Station to be a Model Green Station, and for this purpose specific programmes are being developed for the station covering power consumption, the use of solar energy instead of the ordinary power supply, and the endorsement as well as the introduction of other environmental systems which are environment-friendly and fulfill the stipulations of sustainable development," explained Al Ali.
Cable ramps are essential for covering power cables on walkways to ensure that people do not accidentally trip and fall.
Only a third of those small businesses surveyed had BI coverage--which Sprague says covers business closures due to fire, water damage or theft--but only 10 percent had off-premises utility-interruption protection covering power outage, a typical endorsement to standard BI policies.
Kuwait Financial Centre (Markaz) recently published the executive summary of its infrastructure series covering power, airports, seaports, roads & railways, ICT and water.
Because of its oil-absorbing properties and high covering power, this ingredient is ideal for decorative cosmetic products such as mattifying foundations and loose and compact facial powders.
The official Syrian news agency SANA reported that at the end of the meetings, Jordan and Syria signed agreements for the joint execution of eleven cooperation programs, including a memorandum of understanding covering power, the media and education, reported.
today announced that its two utility subsidiaries have filed amendments with the Public Utilities Commission of Nevada (PUCN) covering power supply and transmission initiatives, including requesting authority to build a transmission line that would for the first time connect Nevada's two major electric systems.
It becomes the third region in the United States to plan a carbon cap-and-trade program, after the Regional Greenhouse Gas Initiative (RGGI), to start in 2009, covering power producers in ten states in the northeastern United States and the Western Climate Initiative covering the U.