DescriptionSpectraSetter system for creating photo positives, including numerous fonts, processing trays, photographic materials, etc. "Instant Letter Transfering" came about in the late 1960s and was most popular in the 1970s and up until the mid 1980s. Similar to Letraset transfer types, Compugraphic and Mergenthaler, a machine like this could help an individual develop what is known today as font and type, as well as transfer images for logo work.