Insulin 8.27 PVC sheet

It is interesting to compare Dunlop's interpretation of Dorothy Hodgkin's insulin diagram with the preceding wallpaper by John Line. In some respects Dunlop were more successful in capturing the delicacy of the original. Polyvinyl chloride (PVC) sheeting was a new material, only recently developed; the sample here is a prototype printed using pilot plant production. Technical problems with the colour printing process hindered Dunlop's plans to mass-produce these designs.