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• W638547420 abstract "Ink tack is a term used by printers to describe the force required to split an inkfilm. Such film splitting is influenced by rheological and adhesive properties as wellas the internal cohesion of ink. Furthermore, the concept of ink tack in printing isassociated with the forces or energy developed in the splitting of ink film at the exitof a printing nip.Stefan studied the forces required to split a thin film. He found that the forcerequired to split a thin film is inversely proportional to the cube of the thickness ofthat film. This association between the film thickness and film splitting force hasbeen questioned in the literature and by this study.In printing, the practical condition related to ink film splitting forces might berevealed by measurement on the Inkometer ( Inkometer response), paper picking,and ink trapping. This study used these responses.The purpose of this study was to investigate the relationship (notmathematical) between ink film thickness (0.6 to 5.4 pm) that should include thefilm thicknesses found on presses.Experiment one was accomplished on the Inkometer with the two blackvegetable-oil-based inks to obtain the Inkometer response under the proposed threeway factorial experimental design ( inks, ink film thicknesses, and time.) Experimenttwo made use of the IGT Printability Tester with the same inks, the IGT oil, and oneof the paper samples to find the critical picking velocity under the proposed two wayfactorial experimental design ( fluids, ink film thicknesses.) Experiment three wasaccomplished with the IGT Printability Tester, the same inks, and two substratesincluding a second paper sample and a plastic film. The response is gravimetrictrapping under the proposed three way factorial experimental design ( inks,substrates, and ink film thicknesses.) Inkometer response, picking velocity, andgravimetric trapping are not direct measurements of film splitting force. They arerelated to film splitting force. The greater the Inkometer response, the more tacky theink. The higher the picking velocity the lower the splitting force. With increasedgravimetric trapping of the second-down inks, the more tacky the first-down inks.The data was analyzed by ANOVA at a level of significance equal to 0.05( two-sided ) to test the null hypotheses. The null hypotheses are the following:Hq^: There is no significant effect due to vegetable-oil-based ink filmthickness on ink tack as measured by an Inkometer.Hq2: There is no significant effect due to film thickness of vegetable-oilbasedfluid on picking velocity under the proposed experimental design on the IGTPrintability Tester.H.Q3: There is no significant effect due to the first down vegetable-oil-basedink film thickness on ink trapping capability under the proposed experimental designon the IGT Printability Tester.An overview of the results show that the ink film thickness could affect theInkometer response and gravimetric trapping, and the oil-basedfluids' filmthicknesses could affect the picking velocity within the…" @default.
• W638547420 created "2016-06-24" @default.
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• W638547420 date "1993-01-01" @default.
• W638547420 modified "2023-09-27" @default.
• W638547420 title "A Laboratory study of ink splitting forces at different film thicknesses and an investigation of the stefan equation" @default.
• W638547420 hasPublicationYear "1993" @default.
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