How is paper money made?

What materials are used to make money?

Contrary to common belief, paper money is not made from wood pulp or standard paper. In the United States, currency is composed of a unique blend of 75 percent cotton and 25 percent linen. This specific fiber composition provides the necessary strength, flexibility, and longevity required for currency that must endure constant folding, washing, and environmental exposure.

The production process begins with the creation of this specialized "paper" by companies like Crane Currency. The material is infused with security fibers—tiny red and blue threads—that are visible upon close inspection. These fibers are embedded randomly throughout the material during the manufacturing phase, serving as an initial layer of defense against counterfeiters who might attempt to replicate the texture or appearance of genuine currency.

How is money printed?

The printing process primarily utilizes a technique known as intaglio printing. This method involves engraving designs into metal plates, which are then coated with ink and wiped clean, leaving ink only in the recessed grooves. When paper is pressed onto these plates under immense pressure, the ink is transferred to the surface, creating a distinct, raised texture that is difficult to replicate with standard digital or offset printers.

1. Large sheets of the cotton-linen blend are fed into high-speed, rotary intaglio presses.
2. The front of the note is printed first, followed by the back, ensuring precise registration between the two sides.
3. Once the sheets are printed, they undergo a drying process to ensure the ink is fully set and durable.
4. The sheets are then inspected by sophisticated optical systems to identify any printing errors or missing security features.

What security features are added?

Modern currency incorporates multiple layers of security to deter counterfeiting. These features are designed to be easily verified by the public while remaining extremely difficult for criminals to forge. Beyond the physical texture of the intaglio printing, manufacturers integrate advanced optical and physical elements directly into the substrate during the production stages.

• Watermarks: An image is created by varying the density of the paper fibers, visible only when held up to a light source.
• Security Threads: A thin, embedded strip runs vertically through the note, often glowing under ultraviolet light.
• Color-Shifting Ink: Certain elements, such as the numeral on the corner of a bill, change color when the note is tilted.
• Microprinting: Extremely small text, which appears as a solid line to the naked eye, is printed in various locations on the note.

How is money cut and packaged?

After the printing and inspection phases are complete, the large sheets must be transformed into individual banknotes. Precision equipment is used to trim the sheets and cut them into the familiar rectangular form. This stage requires extreme accuracy to ensure that every note meets the exact dimensional specifications required by banking systems and automated cash-handling machines.

Once cut, the notes are counted and banded into "bricks" or "straps." These bundles are then prepared for distribution to Federal Reserve banks or central banking authorities. From there, the currency enters the economy through commercial banks, which request physical cash to meet the demands of their customers and businesses. The entire process is strictly monitored to ensure that every serial number is accounted for and that no unauthorized currency enters the supply chain.

Common mistakes when handling money

While the public cannot manufacture money, many people handle it in ways that accelerate its degradation. A frequent mistake is keeping currency in environments that promote mold or bacterial growth, such as damp pockets or humid storage areas. Because the cotton-linen blend is organic, it can absorb moisture, which weakens the fibers over time and makes the note susceptible to tearing or disintegration during routine use.

Another common error involves improper cleaning. Some individuals attempt to wash or sanitize currency using harsh chemicals or abrasive scrubbing. These actions can strip away the specialized security inks, blur the intaglio details, and damage the protective coatings applied during the manufacturing process. To maintain the integrity of your currency, keep it stored in a dry, flat environment and avoid exposing it to extreme heat or chemical agents that could compromise its physical structure.