Your Shopping Cart
Opacity of paper (15/d geometry, illuminant A/2?, 89% reflectance backing and paper backing)
![](/images/newUI/images/docu_img.jpg)
Format: PDF
Language: English
Product Type: Digital
Provider: TAPPI
Shipping: Available for download - Link will be provided in My ComplianceOnline section
Language: English
Product Type: Digital
Provider: TAPPI
Shipping: Available for download - Link will be provided in My ComplianceOnline section
Price:
$53.00
Product Details
Opacity is a fundamental optical property of paper as a whole, yet the measurement of opacity is determined by a ratio of reflectance measurements. The opacity of the sheet is influenced by thickness, the amount and kind of filler, degree of bleaching of the fibers, coating, and the like. The utility of bond, writing and book papers is enhanced by a high opacity.
The essential principle of this method for determining the opacity of paper is as follows: The reflectance of paper when combined with a white backing is higher than that of paper when combined with a black backing because, in the former case, light transmitted through the imperfectly opaque sheet is largely reflected by the white backing, and a portion of the light is transmitted through the paper a second time thus increasing the total reflection. Two types of “white” backing are used, leading to two measures of opacity:
Customers Also Bought
- WATER-SOLUBLE SULFATES IN PULP AND PAPER
Price: $53 BUY NOW - WATER-SOLUBLE CHLORIDES IN PULP AND PAPER
Price: $53 BUY NOW - BASIC DENSITY AND MOISTURE CONTENT OF PULPWOOD
Price: $53 BUY NOW - Fines fraction by weight of paper stock by wet screening
Price: $53 BUY NOW - PREPARATION OF MECHANICAL PULPS FOR TESTING
Price: $53 BUY NOW - Determination of sodium, calcium, copper, iron and manganese in pulp and paper by atomic absorption spectroscopy
Price: $49 BUY NOW
You Recently Viewed