From Kathryn Clark's website:

"Indianapolis native Kathryn Haugh met Lafayette native Howard Clark at Wayne State University in Detroit, where she was working toward a masters degree in fine art printmaking and he toward a degree in industrial design.

They married in 1969 after graduating, and moved to San Francisco, where Kathryn worked as a fine art lithography printer at Collectors Press. In 1971, when Howard and Kathryn realized there was no handmade paper source in the United States and that artists and publishers had to import fine papers from Europe, they founded Twinrocker Handmade Paper to revive the craft.

The following year, they moved to the Clark family farm on the edge of Brookston, Indiana, in White County, to build a mill for making paper pulp. In the 1970s and 1980s, Kathryn developed innovative techniques for using colored paper pulps to create artistic imagery within the paper itself.