The Slow Invention of Spray Paint: From Whitewash to Aerosol Cans

Early Innovations in Spraying Technology

• 💡 Joseph Banks, a maintenance manager at Marshall Fields, is credited with an early sprayer for whitewashing basements in the late 1880s, designed to improve efficiency over buckets and brushes.
• 🎨 Francis Davis Millet, involved with the 1893 World's Columbian Exposition, is associated with a paint sprayer used to quickly coat the exposition's plaster and jute buildings, a contrivance that allowed four men to do the work of 50.
• 🩺 Dr. Alan DeVilbiss, an ear, nose, and throat specialist, developed an atomizer in the late 1880s to evenly distribute medicine, which later expanded to include perfume and paint sprayers by his company.

The Birth of the Aerosol Can

• 🧪 Erik Rotheim, a Norwegian scientist, patented an aerosol can in 1926, using dimethyl ether as a propellant to dispense liquids or semi-liquids.
• 🥫 Rotheim partnered with a Norwegian company to develop a mass-market version for paints and varnishes, but faced challenges with nozzle clogging and eventually sold his patent for a small sum.
• 🎖️ During World War II, US researchers Lyall Goodhue and William Sullivan adapted Rotheim's design to create portable insecticide spray cans for soldiers fighting malaria and typhus.

Ed Seymour and the Modern Spray Paint Can

• 💡 Ed Seymour, in 1949, developed a unique aluminum coating for radiators and, inspired by insecticide sprays, created the first spray paint can.
• ⚙️ Seymour's patent, granted in 1951, featured a hermetically sealed package with an agitator for easy mixing and discharging of paint, initially intended for demonstrations but soon realized as a consumer product.
• 🎨 The Seymour company offered 25 colors in "rattle cans," revolutionizing home, farm, and factory painting with a mess-free, simple application.

Advancements and Environmental Regulations

• 🚀 The development of a more reliable plastic nozzle by Robert Henry Abplanalp's Precision Valve Company in the 1950s led to an explosion in the spray paint industry.
• ⚠️ In the 1970s, regulations like the Clean Air Act prompted reformulations to create low-VOC (Volatile Organic Compound) products and eliminate ozone-depleting chemicals like chlorofluorocarbons.
• 🌱 The industry continues to evolve with efforts to develop truly sustainable spray paint options.