The Story & Science of Potato Chips: From George Crum to Modern Production

Background

Potato chips are ultra‑thin potato slices that are briefly fried in oil and then seasoned with salt, creating the iconic crunch many enjoy.

Historical accounts trace the invention of the potato chip to 1853, when chef George Crum at Moon’s Lake House in Saratoga Springs, New York, allegedly responded to a customer’s complaint—often attributed to Cornelius Vanderbilt—by slicing potatoes paper‑thin. The result was an instant hit, and Crum’s reputation grew quickly. He soon opened his own eatery across the lake, where no reservation system could keep hungry patrons from lining up for the new snack.

By the early 20th century, potato chips had become a staple in speakeasies, prompting the launch of the first home‑based production lines. In 1915, Van de Camp’s Saratoga Chips opened in Los Angeles, and in 1921 grocer Earl Wise began slicing surplus potatoes with a cabbage cutter, packaging them in brown paper bags. The 1920s also saw Jays Foods, founded by Leonard Japp and George Gavora, delivering chips, nuts, and pretzels to speakeasies from a cramped truck.

Initially, chips were prepared in private kitchens and sold fresh, but two key innovations paved the way for mass production. In 1925 the first automatic potato‑peeling machine was introduced, and the following year Laura Scudder’s company began sealing hand‑packed chips in iron‑clad waxed paper bags.

During World II, the U.S. government declared potato chips an essential food, allowing factories to stay open. Post‑war, chips became a popular accompaniment to dips—such as French onion soup mix stirred into sour cream—and television viewing sparked a surge in snack consumption as families gathered in front of their sets.

In 1969, General Mills and Procter & Gamble launched fabricated potato chips—Chipos and Pringles®—made from cooked, mashed, dehydrated potatoes reconstituted into dough. These products were packaged in breakproof, oxygen‑free canisters. The Potato Chip Institute (now the Snack Food Association) sued to prevent the use of the term “chip” for these items; the suit was dismissed, but the USDA required them to be labeled as “potato chips made from dried potatoes.” Though still sold, fabricated chips never rivaled the classic original.

Today, potato chips dominate the U.S. snack market. According to the Snack Food Association, they account for 40% of all snack consumption—outpacing pretzels and popcorn—despite widespread recognition of their limited nutritional value. In the 1990s, manufacturers faced the challenge of creating tasty low‑fat versions without sacrificing flavor.

Raw Materials

Modern potato chip production relies on farm‑fresh potatoes delivered daily to processing plants. Seasonal sourcing varies: Florida supplies in April and May; North Carolina and Virginia in June–August; the Dakotas dominate the fall months; and winter production depends on stored stocks. Stored potatoes are kept at 40–45 °F (4.4–7.2 °C) until a few weeks before use, then moved to a reconditioning room heated to 70–75 °F (21.1–23.9 °C).

Quality begins with selecting the right variety. White potatoes that are larger than a golf ball but smaller than a baseball are ideal. Roughly 100 lb (45.4 kg) of raw potatoes yield 25 lb (11.3 kg) of finished chips.

Frying oils—corn, cottonseed, or blends—are treated with antioxidizing agents to prevent rancidity and filtered daily. Flavorings such as powdered sour‑cream‑onion and barbecue are sourced externally, with flake salt preferred over crystal for even distribution. Some manufacturers treat slices with phosphoric acid, citric acid, hydrochloric acid, or calcium chloride to lower sugar content and improve color.

Packaging is designed in‑house, stored on rolls, and fed to the assembly line as needed.

The Manufacturing Process

• 1. Upon arrival, potatoes undergo a quality inspection: a random sample is punched for tracking, green edges and blemishes are checked, and the weight of defective produce is compared to company thresholds—excess can trigger a full truck rejection.
• 2. The produce moves along a conveyor system that uses gentle vibrations to minimize breakage.

Destoning and Peeling

• 3. Potatoes are loaded into a vertical helical screw conveyor that allows stones to fall to the bottom while pushing the potatoes up to an automatic peeling machine. After peeling, they are washed with cold water.

Slicing

• 4. A revolving impaler/presser cuts the potatoes into paper‑thin slices, 0.066–0.072 in (1.7–1.85 mm) thick. Straight blades produce uniform chips, while rippled blades create ridged varieties.
• 5. The slices undergo a second cold‑water wash to remove released starch. “Natural” brands may skip this step.

Color Treatment

• 6. If color enhancement is needed, slices are immersed in a chemically balanced solution that adjusts pH, hardness, and mineral content.

Frying and Salting

• 7. Air jets strip excess moisture before slices enter 40–75 ft (12.2–23 m) troughs filled with oil at 350–375 °F (176.6–190.5 °C). Paddles gently move the slices as they tumble. Salt is added from overhead receptacles at ~1.75 lb (0.79 kg) per 100 lb (45.4 kg) of chips.
• 8. Flavored chips pass through a drum that distributes powdered seasonings.

Cooling and Sorting

• 9. A wire‑mesh conveyor removes chips from the trough, draining excess oil and initiating cooling. An optical sorter then expels any burnt slices via air puffs.

Packaging

• 10. Chips reach a scale‑controlled packaging machine. A metal detector double‑checks for foreign matter.
• 11. Bags—guided by a CPU‑encoded code—are formed and sealed at both ends while the correct weight of chips is released into each bag.
• 12. To prevent over‑air filling and maintain crunch, many manufacturers use nitrogen. Sealed bags are then collated and hand‑packed into cartons.
• 13. Some producers use “I O” cans, feeding chips down a chute, weighing each can, and attaching a seal.

Quality Control

Hourly taste samples are taken throughout production, assessing salt, seasoning, moisture, color, and overall flavor. Color is matched to industry charts. Breakage prevention is paramount; thus, conveyor heights are reduced, and wide mesh stainless‑steel belts replace plastic ones, allowing only suitably sized chips to advance to frying.

Byproducts/Waste

Rejected potatoes and peelings are donated to farms as animal feed. Starch removed during rinsing is sold to starch processors.

The Future

Potato chips show no signs of waning popularity, but consumer demand for low‑fat options drives rapid innovation. In the late 1990s, Procter & Gamble tested olestra—a fat substitute—in chips. Modern food technologists use computer modeling to design crisper textures, adjusting waveforms and frequencies. Parallel research into genetically engineered potatoes aims to reduce sugar content, minimizing browning and improving product consistency.