Henry Neil Rasmusen is the author of 'Printmaking With Monotype', Chilton Company, 1960, a comprehensive book detailing numerous monotype techniques.
Curator/print historian Joann Moser comments on page 150 of 'Singular Impressions: the Monotype in America':
"The seeds of the contemporary monotype phenomenon were planted in 1960, beginning with the publication of Henry Rasmusen's 'Printmaking with Monotype'. The book summarized the history of the medium from Castiglione to contemporary practitioners, providing a historical context for the work of several highly respected artists and conferring on the medium the stamp of legitimacy and tradition that it had previously lacked."
To achieve this monoype Rasmusen has used the "additive method", which he describes on pages 115 through 123. He used a scratch drawing, adding thick, viscous inks, scratching back into the plate, which has perforated the paper in a few places.