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Papermaking, Ink Chemistry and Printability of “United States Three-Cent Bank Note”. Matej Pekarovic 1 , Alexandra Pekarovicova 1 , Jan Pekarovic 1 and John Barwis 2 1 Western Michigan University, Center for Ink and Printability, 4601 Campus Dr., A -231 Parkview, Kalamazoo, MI 49008-5462
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Papermaking, Ink Chemistry and Printability of “United States Three-Cent Bank Note” Matej Pekarovic1, Alexandra Pekarovicova1, Jan Pekarovic1 and John Barwis2 1Western Michigan University, Center for Ink and Printability, 4601 Campus Dr., A -231 Parkview, Kalamazoo, MI 49008-5462 2Institute for Analytical Philately, PO Box 751833, Las Vegas, NV 89136-1833
Production of 3- Cent Stamp Over 6.6 billion stamps
Customary Bending Index: Bending Resistance/Stamp Weight
American BNC 1879 Stamps Population Distribution, Gurley Units Bending Index Range American BN 1879 [GU/g]
American BNC 1881 Stamps Population Distribution, Gurley Units
Re-pulping of National Stamps Prior to Fiber Analysis Easy repulping Repulping difficulties
Re-pulping of Continental (Left) and American 1879 Stamps (Right) Bluish bleed Yellow bleed