MACtac® Supplies Pressure-sensitive Adhesive Label Material for the Latest FOREVER Stamps

USPS Shares the Legacy of Four Distinguished American Scientists 

The U.S. Postal Service shares the legacy of four distinguished American scientists with the dedication of its latest FOREVER® stamps. MACtac® supplied the pressure-sensitive adhesive label materials for 30 million, 44-cent first-class stamps issued.

The stamps celebrate American scientists’ commitment to understanding the fundamental process of nature and their contributions to the advancement of science. The stamps were designed by art director Ethel Kessler and designer, typographer and photo illustrator Greg Berger. They worked together to create a collage featuring a photograph, a signature and items such as equations and diagrams associated with each scientist’s research.

“MACtac is happy to be a part of the celebration honoring American scientists,” said Allison Hazel, marketing manager, MACtac Printing Products. “Science is important in our everyday lives, and the hard work of scientists often times goes unrecognized. By acknowledging their contributions, we hope to inspire another generation of scientists to continue to fuel advances.” 

The stamp issuance honors chemist Melvin Calvin; botanist Asa Gray; physicist Maria Goeppert Mayer; and biochemist Severo Ochoa. They were recognized by Pritha Mehra, USPS vice president, mail entry and payment technology, at a special ceremony at the Science Museum of Minnesota on June 16, 2011. The ceremony enabled the USPS to share the stories of each of the scientists. Their contributions and achievements include the following:

Melvin Calvin was the first scientist to trace in detail the process of photosynthesis, and he conducted pioneering research on using plants as an alternative energy source. He won the Nobel Prize in chemistry in 1961.

Asa Gray, one of the first professional botanists in the United States, advanced the specialized field of plant geography and became the principal American advocate of evolutionary theory in the mid-nineteenth century.

Maria Goeppert Mayer developed a theoretical model that helped explain the structure of the atomic nucleus; for this work she became one of only two women, the other Marie Curie, to win a Nobel Prize in physics.

Severo Ochoa, a biochemist, was the first scientist to synthesize ribonucleic acid, and he competed in the race to decipher the genetic code. Ochoa won the Nobel Prize in physiology of medicine in 1959.

The American Scientists stamps are the third in the American Scientist series issued by the USPS. The first series was issued in 2005 and featured geneticist Barbara McClintock, thermodynamicist Josiah Willard Gibbs, mathematician John von Neumann and physicist Richard Feynman. The second series was issued in 2008 and included physicist John Bardeen, biochemist Gerty Cori, astronomer Edwin Hubble and structural chemist Linus Pauling.

The stamps celebrating American scientists are FOREVER stamps and are available as a pane of 20 stamps, a block of 10 stamps, or a block of four stamps. Stamps may be purchased at local post offices, at the postal store website at, or by calling 800-STAMP-24.

MACtac has been a qualified supplier for USPS stamps for more than seven years, providing materials for a number of pressure-sensitive stamps, including the Purple Heart with Ribbons, Wedding Roses, Neon Celebrate!, Holiday Evergreens Forever, Federal Duck Stamp, Nature of America: Hawaiian Rain Forest, and Sunday Funnies. For more information about MACtac Roll Label, please call 800.255.9733 or visit


About MACtac

MACtac is a leading global supplier of pressure-sensitive adhesives. Founded on personal service, technical support, quality assurance, custom capabilities and supply chain efficiency, MACtac is dedicated to providing superior quality to its customers. Headquartered in Stow, Ohio, MACtac is a subsidiary of the Bemis Company, Inc., the largest flexible packaging supplier in North America. For more information, please visit


About Bemis Company, Inc.

Bemis Company is a major supplier of flexible packaging and pressure-sensitive materials used by leading food, consumer products, healthcare, and other companies worldwide. Founded in 1858, the Company is included in the S&P 500 index of stocks and reported 2010 net sales of $4.84 billion. The Company’s flexible packaging business has a strong technical base in polymer chemistry, film extrusion, coating and laminating, printing, and converting. Headquartered in Neenah, Wisconsin, Bemis employs nearly 20,000 individuals worldwide. More information about the Company is available at our website,

1 Like
Recent Stories

MindFire Announces Release of "Lead Gen Machine" for Printers and Marketing Service Providers

MindFire Celebrates a Decade of Making Printers and Print Service Providers Successful