Is There A Definition Of Japan Paper And India Paper Related To Paper Fibres?

Hello,

I would like to know more about the two mentioned paper types.
From time to time I read about them, but never really a definition. The only thing I found is that in India paper there are also bamboo fibres. But how much more or less in %, and what else?

I know that this is a bit a generic question. But the terminology "Japan paper" and "India paper" suggest also a generic definition :).

The india paper is probably most used for wrappers and is more brown if I understood correctly. Also, large fibers are visible. Are those large fibers then always bamboo?

About the paper fibres of Japan paper I did not find anything, neither where it was really used in US classic stamps?

Thank you for any help.
(I don't have any stamp where I wonder about this, just have read about those paper types)

Only source I found is this, but no answer to my quesitons above.
https://info.mysticstamp.com/learn/...-u-s-stamps/

littbarski wrote:



Your guess about India paper is quite far from the mark. This is a very white soft paper without a sizing agent, and was regularly used for proofing. The highly bleached paper fibers of India paper can be rather long and readily visible with the naked eye. This proofing paper was dampened, sometimes lightly dusted with a powder bonding agent, and placed over/upon white cardboard for die and plate proofing. Even without a bonding agent these were pressed with such force that the India paper tended to adhere quite strongly to the cardboard after the proof had been pulled. Proofs on India have been peeled away from their card backing, but are best left in place for their long term preservation.

For US material the term "Japan paper" might better be associated with the 20th century. It does not seem to have been part of archival work by the stamp producers before the BEP took over. The best description of which I have note says: "The term "Japan paper," as opposed to "Japanese paper," was used to describe a Western-made smooth sheet with a slightly mottled surface, inspired (if only vaguely) by Japanese printmaking paper. Prior to WWII Japan paper was favored by printmakers looking for a very crisp look."

All that notwithstanding, there are some very special proof prints for the designs of 1869 in which the paper more closely conforms to the description above, even with color elements embedded. But they are exceptional for their time.

US specialists familiar with twentieth century essay-proof (aka "archival") material may wish to chime in on this in relation to the use of the term "Japan Paper."

thank you very much, interesting.
Sorry about the India confusion, I think I was misleaded by Manila paper :).
Are the long fibers of the India paper mostly bamboo or are there no specific paper fiber types but more the visual impression is important?

The Japan paper: I am glad to read this first definition and will be glad to read any further of course.
But at least it seems it is not a silky transparent paper ("rice paper")?

Unfortunately I don't have an article or catalogue here where I read this term but this is just a topic where I made my own notes some years ago in a computer document without ever understanding the terminology. I guess the India paper and Japan paper was something I read to that time when I read a lot about the Bank Note papers, but I think today that there is no relation.