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Dirt in pulp – chart method

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
This method provides a test for estimating the amount of dirt in pulp including recycled pulps to help the mill meet its needs for production of fine or other speck-free papers.
The estimated equivalent black area of a gray or colored speck is smaller than its actual area, in inverse proportion to the intensity of its color contrast with its background. Thus, the equivalent black area of a black spot in a nonbleached pulp would be considerably smaller than its actual area because its appearance would not be as pronounced as it would be if it were in a white pulp.
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