The History, Production, and Safety of Modern Crayons

Background

Graphic communication dates back to prehistoric cave drawings, where early humans scratched images with crude tools and limited pigments. Today’s artists have a wide range of sophisticated tools, but the humble crayon remains a staple in classrooms and creative studios worldwide.

Crayons are manufactured from paraffin wax, a by‑product of wood, coal, or petroleum. Commercial production of paraffin began in 1867, and the first colored crayons appeared in Europe around the turn of the 20th century. Early versions were primarily black, marketed to factories as waterproof markers. In 1903, Binney & Smith introduced the first child‑friendly set of eight colored crayons, a product that quickly became a standard in American schools.

Raw Materials

Paraffin wax is delivered to factories in liquid form; trucks maintain temperatures above 135 °F (57 °C) to keep it fluid. Because paraffin is hydrophobic, pigments are added as finely ground powders. Pigment manufacturers produce these powders by blending chemicals in large wooden tanks, filtering, and kiln‑drying the resulting chunks. Once dried, pigments are pulverized and blended to achieve precise color consistency, then shipped to the crayon plant.

In recent years, manufacturers have enriched crayons with additives such as glitter—tiny reflective shards that give drawings a subtle sparkle—and subtle fragrances. These ingredients are carefully tested to ensure they do not compromise the product’s safety.

The Manufacturing Process

Mixing the Batch

• Paraffin is pumped into storage tanks outside the factory—each holding roughly 17,000 gallons (65,875 L). When production starts, the wax is transferred to heated tubs with a volume of about 6 gallons (23 L). Pigments are added to create the desired hue.

Mixing and Molding

• As the wax “wets” the pigments, the mixture is stirred until it is uniform. The blended compound is then automatically poured into molds. Rotating blades inside the molds eliminate bubbles, while circulating water cools the material. Depending on color, cooling times range from 4 to 7 minutes. A typical mold can hold up to 2,400 individual crayons.

Inspection and Quality Control

• After cooling, crayons are ejected from the molds and inspected for defects such as cracks, chips, or internal bubbles. Defective pieces are remelted and recast to meet strict quality standards.

Wrapping and Boxing

• Approved crayons are automatically sorted into racks, double‑wrapped in paper for durability, and boxed for distribution to wholesalers and retailers.

Modern production lines run continuously to meet the demand for over 100 distinct colors. Unlike the early days, where a single factory floor might produce one color per day, today’s facilities dedicate only a few molds or vats to each hue, enabling efficient, high‑volume output.

Environmental and Safety Considerations

Since the early 1990s, Binney & Smith has marketed crayons scented with food‑grade aromas. To address safety concerns—particularly the temptation for young children to ingest them—the company shifted to non‑edible scents such as flowers. All crayons sold in the U.S. are non‑toxic; U.S. regulations require that all art materials meet stringent safety standards.

Safety evaluations are conducted by the Arts and Crafts Materials Institute in Boston, Massachusetts. Each product formula is reviewed by a toxicologist, who assesses not only individual ingredient toxicity but also potential interactions and skin‑irritation risks. Re‑evaluation occurs at least every five years, and any formula change triggers a new assessment.