Henry Alvah Strong invested $1,000 with George Eastman on December 23, 1880, which was the beginning of a long and profitable partnership. On January 1, 1881, Strong became president of the Eastman Dry Plate Company. An additional $5,000 was invested by Strong before the end of that year.
Strong and Eastman had opposite personalities: Strong was very outgoing and talkative, while Eastman was more reserved1.