This seems like an excellent context to provide a link to that book.
Re:Folding Paper with a Hydraulic Press
by vanderZwan on Wednesday May 18, 2016 @11:06AM
(#11722466)
The Complete Book of Papermaking by Josep Asuncion[0]. It lives up to its name, and includes many of the paper/cardboard types it discusses.
[0] http://www.goodreads.com/book/show/2665596-the-complete-book...
No glue according to this source: http://www.paperonweb.com/A1010.htm
Re:Folding Paper with a Hydraulic Press
by vanderZwan on Wednesday May 18, 2016 @11:09AM
(#11722489)
> Main ingredient of all paper is plant material. Loading or filling material such as clay, CaCO3, Talc, TiO2 etc. are used for higher brightness and better printability. Rosin, alum or combination of other chemicals is used to make paper water resistant.
I guess the book I mentioned just categorised things differently - I think the "glue" bit was mainly about water resistance and general durability. Then again, it's been years since I've read the book (and I don't have it with me to check it right now), so I might be misremembering it.
Either way, I admit that "chemical additives" would make more sense as a general label! I mean, adding a chemical to make paper fire resistance can't be called filler or glue.
Nitpicking: my book on paper-making talks about fiber, "filler" and "glue" as the main components in any paper or cardboard sheet.
The type of fiber results in different qualities based on source material (types of wood, cotton, etc) and fibre length - every time paper is recycled the fibers get shorter, and less "fluffy". This is why toilet paper from recycled paper is coarser; it's also why toilet paper inherently wastes good fibers: the good stuff is made from fresh fibers. On the other end we have stuff like the paper used in newspapers. Eventually, the fibers get so short they can only be used for the type of brittle cardboard pulp you see in egg carton.
Combined with fiber length, filler materials determine characteristics like how porous paper is, or how stiff. Glue.. well, should be obvious what that does, and how different types and quantities affect paper.
None of this matters for Gallivan’s Theorem, other than perhaps the variation in compressibility that different paper types have. It might have an influence on the whole fusing-into-a-slab thing though.