Details:
Summary:
The basic formulation of most Type C gravure ink vehicles involves the use of RS nitrocellulose, hard resin and plasticizer. A recently developed, nitrocellulose-compatible, vinyl resin solution has also found application in these systems as a means to achieve better performance and economics. In order to define the effects of this resin in Type C vehicles, a study has been conducted in which variations in solution viscosity and homogeneity, as well as film hardness, solvent release, block temperature, adhesion and flexibility have been related to compositional changes. The principles of fractional factorial experiment design and regression analysis by computer have been used to study the effects of compositional variables on the performance and economics of these vehicles. This paper serves to illustrate these effects and to describe the general techniques of computerized experimental data processing.