Author

Sporka

Date of Award

4-2002

Degree Name

Master of Science

Department

Chemical and Paper Engineering

Department

Paper Engineering, Chemical Engineering and Imaging

First Advisor

Dr. Alexandra Pekarovicova

Second Advisor

Dr. Paul D. Fleming III

Third Advisor

Dr. Abhay Sharma

Access Setting

Masters Thesis-Open Access

Abstract

Press return inks represent a continuous problem in printing industry. The best way of utilizing them is to mix them into new colors. Efficiently to do so, it is necessary to determine their composition first. The spot color inks for product gravure were analyzed using Perkin Elmer Spectrometer LAMBDA 900. UV/VIS/NIR analysis of mixtures showed rather similar course of ink spectra in ultraviolet and near infrared region. Thus, the VIS range from 400 - 700 nm was used for further analysis. The unique course of spectral curves of each pigment in visible region enabled successful qualitative analysis of two- and three- pigment dispersion mixtures. Quantitative analysis was performed using MS Excel Solver program. Linear combination model was used for retroengineering of ink mixtures. It was found to be reliable technique. Also linear, quadratic, and cubic spline functions· were discussed. The cubic splines were considered to be the best fit.

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