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Midterm Study Guide
March 3, 2013
Resolubilization of water based ink on the press- mechanism.
Film forming resins in water based ink formulations. The function of vehicle in ink.
Drying of water based inks. Water based ink: pH and solubility. Th
Laboratory 3: Viscosity, Solids and Specific gravity of Liquid Inks
Determine the viscosity using Brookfield rotational viscometer. Observe the thixotropic
behavior offlexo ink. Determine how the ink solids content affects viscosity. Measure
Laboratory 2: Testing Dry Ink Films Properties
The aim of this laboratory is to measure optical and end-use properties of printed ink film. Optical
properties reflective density, specular gloss of print, gloss of substrate, delta gloss (delta gloss= gloss
Laboratory 1: SPOT COLOR MATCHING
The goal: To match litho sheet-fed spot color ink. Mix the spot color and print on Little Joe
sheet-fed proofing press.
Process: Four different spot colors are available to match; each group will choose one and try
1. Mixing different shades of other colors to get a desired end product creates
spot colors. Ritz Red is a spot color compared to magenta, which is a process
2. The three main tests for ink are measured a
RED 49 - AZO PIGMENT
The goal: Get feel for synthesis of organic azo pigments, see how ingredients react, how pigment
crystallize. Calculate the amounts of reactants. Please, come ready. Calculate the needed amoun