Many hobbyists do not realise that papers can have grain. This is not a fault on their part, but knowledge of what it is all about can help prevent things from going wrong when using paper
Not all papers have a grain. For some papers the grain is very pronounced. One wag once explained to me that 'wood comes from trees ~ trees and wood have grain ~ the paper grain depends on the way the paper has been made from the tree trunk'. That person was correct ~ apart from the last bit.
It took a while to get here. I commend your patience. I think it is worth it explaining it in detail. The reason for that is my own history of bodging some projects by not knowing the importance of going with the grain. Hopefully you will not have any troubles.
More about this is available under several headings ~ it is an important topic ~
~ Why grain is important .
~ Papers with grain, or no grain at all. .
~ Ways of finding the direction of paper's grain (1) tear it ~ .
~ Ways of finding the direction of paper's grain (2) wet it ~ .
~ Ways of finding the direction of paper's grain (3) ~ cheat it .
~ Ways of finding the direction of paper's grain (4) ~ paste it .
~ Ways of not finding the direction of paper's grain (5) ~ guess it