In this example of searching for a process, we'll look for the intaglio printing process. First we'll search in PittCat.:
1. From PittCat, click "Advanced Search"
2. From the dropdown "search by" menu, select "subject"
3. Enter "intaglio" in the search box and search
The results are limited, however, the first result shows the Library of Congress subject heading "Intaglio Printing". When clicked on, the subject heading link will bring you to a page showing all of the books that fall under that subject heading. One of the books that appears as a result is Etching, Engraving, and Intaglio Printing which covers different processes and techniques of printmaking.
Watching videos about different processes is also a great way to do research on processes. Here are a couple of places you can start: