The History, Production, and Future of U.S. Paper Currency

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Background

The concept of money—an exchange medium for goods and services—dates back to at least 3000 B.C., when Sumerians traded barley for metal coins. Paper money first appeared in 7th‑century China, but its lack of intrinsic value triggered inflation and fiscal crises. It wasn't until 1658 that Swedish financier Johann Palmstruck introduced the nation's first state‑issued paper note, reestablishing paper currency in circulation.

In the United States, the Massachusetts Bay Colony issued the first paper notes in 1690, denominated in British pounds. Maryland produced the first dollar bills in the 1760s, and the Continental Congress printed Continental Currency during the Revolution. Widespread counterfeiting and political uncertainty led to a dramatic devaluation of the new paper money.

Learning from that failure, the U.S. government avoided issuing paper currency again until the mid‑1800s. Between then and the Civil War, private banks, utilities, merchants, and even individuals issued their own notes, resulting in roughly 1,600 distinct types in circulation by 1861—many of which were counterfeit or worthless.

Recognizing the need for a stable, unified currency, Congress authorized federal paper money in 1861. President Lincoln established the Secret Service in 1865 to combat counterfeiting. Early notes varied in design and denomination but were larger than today’s bills. The current size was adopted in 1929. In 1945, the Treasury stopped printing denominations above $100, and in 1963 it ceased issuing silver‑certificate bills that promised redeemability in silver.

Raw Materials

Paper money is made from a blend of 75 % cotton and 25 % linen, giving it a distinctive feel and durability. Small segments of red and blue fibers are scattered throughout for visual identification. Beginning in 1990, $10 and higher denominations incorporated a polymer security thread laminated between two plies; the $5 bill added the thread in 1993. The thread is invisible except when held to light, preventing duplication by photocopiers or printers.

Inks are specially formulated thick, oil‑based pigments. Black ink prints the front; green ink prints the back, giving paper money its nickname “greenbacks.” Colored seals and serial numbers on the front are printed separately with standard inks.

Design

The front and back of each denomination are hand‑tooled by skilled engravers, each responsible for a specific element—portrait, numerals, or decorative motifs. Portraits reflect historical significance and public recognition; living persons are prohibited from appearing on currency by law. George Washington, Abraham Lincoln, and Benjamin Franklin grace the $1, $5, and $100 bills, respectively.

In 1955, Congress mandated the inscription “In God We Trust” on all U.S. currency. The first bills with this phrase appeared in 1957 and now feature on the reverse of every paper note.

Microprinting—tiny text measuring 0.006–0.007 inches (0.15–0.18 mm)—was introduced in 1990 around the portrait’s perimeter, repeating “The United States of America.” All denominations except the $1 bill display this feature.

The Manufacturing Process

All U.S. paper money is engraved and printed by the Bureau of Engraving and Printing (BEP), part of the Treasury Department. The main facility in Washington, D.C., and a secondary plant in Fort Worth, Texas, produce approximately 38 million notes daily—45 % $1 bills, 25 % $20 bills, and the remainder distributed among $5, $10, $50, and $100 denominations. The $2 bill is rarely printed due to low circulation. Production cost per note averages 3.8 cents.

The production workflow consists of 65 distinct operations. Key steps include:

Engraving the Master Die

• Engravers hand‑cut designs into a soft steel master die using fine tools and magnification. Portraits feature intricate lines, dots, and dashes; background cross‑hatching is produced by a ruling machine, while scrollwork is cut on a geometric lathe.
• When a new Treasurer or Secretary of the Treasury is appointed, their signatures are enlarged photographically and traced by hand with a pantograph. Diamond‑tipped needles cut the signatures into the master die.

Making the Master Printing Plate

• After inspection, the master die is heated and a thin plastic sheet is pressed into it, creating a raised impression. Thirty‑two such impressions are bonded to form an “alto.”
• The plastic alto is plated with copper in an electrolytic tank, then stripped to leave a thin metal “basso” bearing 32 recessed impressions. The basso is polished, inspected, and plated with chromium to harden the surface, yielding the master printing plate.

Printing the Front and Back

• Intaglio printing, prized for fine detail and counter‑counterfeiting resistance, is used. Ten thousand sheets of paper—each accommodating 32 bills—are fed into a high‑speed rotary press. The correct security thread is verified, and the master plate is secured to the cylinder.
• Ink is applied to the engraved recesses; a wiper removes excess ink. The paper is forced between the master and a hard impression cylinder under 15,000 psi (1,034 bar), producing a raised image ~0.0008 in (0.02 mm) above the paper. The process runs at ~10,000 sheets per hour.
• Backs are printed with green ink first and allowed to dry 24–48 hours before the front is printed with black ink.

Printing Treasury Seal and Serial Numbers

• After intaglio, the stacks are cut into two piles of 10,000 sheets and visually inspected. Each sheet passes through a letterpress that prints the Treasury seal and 16 serial numbers simultaneously. The numbering scheme increments by 20,000 between adjacent bills, ensuring sequential serials within each stack.
• Sheets undergo machine inspection; defective bills are marked for removal and replaced with star notes—special notes with a distinct serial sequence and a star after the number.

Cutting and Wrapping

• Sheets are gathered into stacks of 100, cut into 16 stacks of 100 bills each with a guillotine knife. Defective bills are replaced with star notes at this stage.
• Stacks are banded, visually inspected, and shrink‑wrapped into bundles of ten. Four bundles form a “brick” before shipping to Federal Reserve Banks and other agencies.

Quality Control

Stringent quality control ensures that every bill meets exacting standards. Raw materials—ink, paper, and security threads—undergo rigorous testing for color, viscosity, thickness, and chemical composition. The paper is manufactured by a single, confidential producer, and possession of this paper by anyone else is illegal.

Finished bills are periodically tested for durability: some are run through washing machines to assess colorfastness; others are repeatedly rolled and crushed to determine resistance to handling. Estimates suggest a note can withstand up to 4,000 folds and crumples before replacement.

Destruction of Paper Money

Despite high‑quality materials, a $1 bill’s average lifespan is about 18 months; higher denominations last longer. When a bill becomes defaced, torn, or too worn to be identified, it is removed from circulation, returned to the Federal Reserve, and shredded. Some shredded material is recycled into roofing shingles or insulation. Flawed bills caught during production are shredded at BEP plants.

The Future

Modernizing U.S. currency began in 1996 with new $100 bills featuring a redesigned front and back and advanced security features. Future releases will introduce new denominations annually, retaining the same paper, size, and color.

Security features on the new $100 bill include a larger Benjamin Franklin portrait, a watermark displaying a second Franklin image, a polymer security thread that glows red under UV light, and fine concentric lines that resist photocopying. Microprinting appears in two locations: “USA 100” within the lower left numeral and “United States of America” along Franklin’s coat lapel. A color‑shifting ink prints the lower‑right numeral, green from the front and black from the side.

Lower denominations will incorporate many, but not all, of these features. The highest protection is reserved for the $100 bill because it is the most widely circulated and most frequently counterfeited abroad.

Proposed features such as holograms, plastic films, and coded fiber optics were omitted to avoid technical challenges and maintain continuity with existing currency.

In the longer term, paper money may be supplanted by electronic value stored on chip‑enabled plastic cards, with transactions conducted via card readers.