1878 - George Eastman was one of the first to demonstrate the great convenience of gelatin dry plates over the cumbersome and messy wet plate photography prevalent in his day. Dry plates could be exposed and developed at the photographer's convenience; wet plates had to be coated, exposed at once, and developed while still wet.
1879 - Eastman invented an emulsion-coating machine which enabled him to mass-produce photographic dry plates.
1880 - Eastman began commercial production of dry plates in a rented loft of a building in Rochester, N.Y.
1881 - In January, Eastman and Henry A. Strong (a family friend and buggy-whip manufacturer) formed a partnership known as the Eastman Dry Plate Company. ♦ In September, Eastman quit his job as a bank clerk to devote his full time to the business.
1883 - The Eastman Dry Plate Company completed transfer of operations to a four-story building at what is now 343 State Street, Rochester, NY, the company's worldwide headquarters.
1884 - The business was changed from a partnership to a $200,000 corporation with 14 shareowners when the Eastman Dry Plate and Film Company was formed. ♦ EASTMAN Negative Paper was introduced. ♦ Eastman and William H. Walker, an associate, invented a roll holder for negative papers.