Assignment – Ink & Fountain solution
Weight: 15% of your final grade
In this assignment you will learn about offset ink manufacturing and the importance of fountain solution.
Ink (Part 1)
In the first portion of this assignment you will watch the video:” How ink is made” on YouTube
Show in a flowchart the steps that are necessary to manufacture an ink. Describe also the quality control tests that were carried out in the video and what is their purpose.
In the second portion of this assignment you will learn about the functions of fountain solution in the offset lithographic process. You will learn about the components in fountain solution and also how to test a fountain solution.
For this assignment you will be provided with data on pH and conductivity, two important properties of fountain solution, during the addition of fountain solution concentrate to water.
Rub resistance (Part 3)
In the third part of this assignment you will learn about the rub resistance of offset lithographic inks. You will also learn how the substrate has an influence as well. The rub resistance is also influenced by ink components like waxes and hard drying vegetable oils.
For this assignment you will watch a video on how to test for rub resistance. You will need to research on how the rub resistance of an offset ink can be controlled. Find out in what instance(s) an offset ink should have no wax in their formulation in them.
GCM 240
• Materials Science for Print
• Fall 2021
GCM 240 – Material Science – F2021 – Ink & Fountain solution Page 2 of 11
Document version: 1.0
File naming convention:
JayPark_GCM240_Assignment2_Student name_F2021.pdf
Reading for this assignment:
Levenson, H., Parsons, J., Introduction to Graphic Communication (2018), Chapter 7, p. 126 -127
Report Format
Title Page
Include the following information:
university name, course name/code, student names and student numbers, workshare percentage, section number, lab instructor, due date.
Test Results
Summarize your results for each test either by explaining visually or by presenting your data in a chart and/or graph.
Report format
Discussion
a. Ink manufacturing
a. Create a flowchart that shows the steps involved in manufacturing offset
lithographic ink.
b. Describe the quality control test shown in the video and their importance for the
performance of the ink on press.
b. pH and Conductivity of Fountain Solution
a. What happened to pH and conductivity as fountain solution increments were
added? Why?
b. What is the ideal fountain solution-concentrate to water ratio? Why?
c. Rub resistance
a. How is the rub resistance influenced by ink components like waxes and hard
drying vegetable oils?
b. In what instance(s) an offset ink should have no wax in their formulation? Why?
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