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Leneta Paper-Testing Inks

Leneta Company

[American]
Contact:

address:
15 Whitney Rd. Mahwah, NJ, 07430 USA
Tel:
1-201-847.9300
Fax:
1-201-848.8833
Http:
www.leneta.com
E-mail:
sales@leneta.com

See larger image

Product Type:
Construction & Real Estate/Dec...
Post Date :
2015-12-09 17:14:34
Expiry Date:
6 months
Quantity:
Specs:
Size 6 x 12 in
Payment Method:

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For Evaluating Mottle, Holdout and Porosity of Coated and Uncoated Papers
These testing inks provide a simple and rapid way of monitoring batch-to-batch variations in paper structure and porosity. Inks of both high and low penetrations are required because the penetration quality of the ink must be appropriate to the holdout of the paper surface being tested. Coated papers, being relatively high in holdout, require a high penetration ink to obtain a sufficiently strong color and mottle pattern. Uncoated papers, being low in holdout, require a low penetration ink to avoid excessively strong color that would overwhelm any mottle or holdout distinctions. Examples of test patterns obtained using the two inks, demonstrating their specialized nature.
 
Test Procedure: Spread the ink on the paper to be tested using a spatula or drawdown applicator. After one minute remove the ink by first scraping off most of it with a straight edge, then wiping away the remainder carefully with a clean paper towel. The resultant test pattern is characterized visually for mottle and porosity. To obtain an instrumental value for porosity, measure the CIE-Y reflectances, or the densitometer values, of the stained and unstained areas, then calculate:
 
Porosity Index (Holdout)/100 = Y unstained - Y stained/Y unstained = 10ΔD - 1/10ΔD
 
Where D = densitometer value and Δ D = D stained - D unstained
Leneta charts have long been recognized as the industry standard throughout the world. We have earned our leadership position by producing charts that our customers depend upon for imperviousness to solvent and waterborne coatings, wettability, adhesion and surface smoothness. As the paint industry's oldest and foremost supplier of paint test charts, we have the knowledge and experience to help customers select the most appropriate chart for their test applications. Worldwide representatives ensure prompt, reliable delivery.
For Evaluating Mottle, Holdout and Porosity of Coated and Uncoated Papers
These testing inks provide a simple and rapid way of monitoring batch-to-batch variations in paper structure and porosity. Inks of both high and low penetrations are required because the penetration quality of the ink must be appropriate to the holdout of the paper surface being tested. Coated papers, being relatively high in holdout, require a high penetration ink to obtain a sufficiently strong color and mottle pattern. Uncoated papers, being low in holdout, require a low penetration ink to avoid excessively strong color that would overwhelm any mottle or holdout distinctions. Examples of test patterns obtained using the two inks, demonstrating their specialized nature.
 
Test Procedure: Spread the ink on the paper to be tested using a spatula or drawdown applicator. After one minute remove the ink by first scraping off most of it with a straight edge, then wiping away the remainder carefully with a clean paper towel. The resultant test pattern is characterized visually for mottle and porosity. To obtain an instrumental value for porosity, measure the CIE-Y reflectances, or the densitometer values, of the stained and unstained areas, then calculate:
 
Porosity Index (Holdout)/100 = Y unstained - Y stained/Y unstained = 10ΔD - 1/10ΔD
 
Where D = densitometer value and Δ D = D stained - D unstained