<p>Green Printing: Colorimetric and Densitometric Analysis of Solvent-based and Vegetable Oil-based Inks of Multicolor Offset Printing</p>

Abstract

The purpose of this study was to determine the differences in the measurable print attributes (Print Contrast and Dot Gain) and color gamut of solvent-based (SB) inks vs. vegetable oil-based (VO) inks of multicolor offset printing. The literature review revealed a lack of published research on this subject. VO inks tend to perform (color reproduction) better than petroleum inks; in recent years many printers have come to prefer using VO inks. This research adopted an experimental research method. The experiment was conducted in a computer to plate (CTP) based workflow. During the printing, once the density values met the standard (GRACoL) ink density values, the press was run continuously without operator interference and 1,000 sheets were printed, from which 278 were randomly selected for colorimetric and densitometric analysis. The color gamuts of both inks were derived by using colorimetric data. The comparison of SB inks to VO inks led to the conclusion that the latter provides a greater color gamut. VO inks offer greater color perception in printed images. The densitometric findings make it difficult to draw conclusions about print contrast, as each of the inks had statistically significant higher levels of print contrast for two of the four ink colors. Further study is needed to control the variables.

Offset printing results analysis of different based inks in cardboard packaging production

“…In these measurements, the lowest density value was measured in MOB ink, the highest ink density value was measured in UV ink, the density of the SOB ink's density value was measured between the other two inks. In this case, it was understood that the solvent difference of the ink and the ink difference affect the ink density values of the printing in the prints made on the cardboard substrates 21 .…”

The examination of vegetable- and mineral oil-based inks’ effects on print quality: Green printing effects with different oils

“…Some water and a little solvent are enough to clean machinery after printing. 6 Today's regulations and requirements regulate the use of harmful organic chemicals (volatile organic compounds, or VOCs) in ink and dyes to prevent solvent emissions. VOCs, which evaporate and expand at room temperature, are chemicals with high vapor pressures.…”

Formulation of Green Varnish from Ecological Friendly Material for the Development of Offset Printing Ink

“…Other than that, vegetable oil inks, compared to petroleum-based inks, are less likely to build up on the printing plate, thus facilities can remain clean. This is because vegetable oil's boiling point is significantly higher than that of petroleum oil, and it is less likely to become volatile at high temperatures [3]. In addition, vegetable inks can reduce ink and paper waste because the balance between ink and water is easier to achieve [3].…”

“…This is because vegetable oil's boiling point is significantly higher than that of petroleum oil, and it is less likely to become volatile at high temperatures [3]. In addition, vegetable inks can reduce ink and paper waste because the balance between ink and water is easier to achieve [3].…”