I just finished reading a book, The Production and Properties of Plastics. I won’t link to Amazon.com, because it probably isn’t there. The book was written shortly after World War II.
I learned what a sprue is. I wonder if they still use some of the terms, like ‘flash.’ Mainly it was a lot of chemical names, of which only a handful of trade names, such as lucite and formica, were familiar.
I’m not sure what the personal enrichment was for reading this book, but anyhow, time to move on.