Complex sentence: Competing transparency films, such as Fujifilm Fujichrome and Kodak Ektachrome use the simpler, quicker and more accessible E- 6 process; this eroded Kodachrome's market share as the quality of competing films improved during the 1980s and 1990s.
Split into simpler sentences: Competing transparency films, such as Fujifilm Fujichrome and Kodak Ektachrome use the simpler, quicker, and more accessible E- 6 process. This eroded Kodachrome's market share, as the quality of competing films improved during the 1980s and 1990s.