I needed to describe the way in which I sometimes cut papers. I use a knife as if it was a paper knife  , in just the way it would be used to open an envelope. It is an easy and efficient way of cutting some materials ~ when other tools are not as useful. It does not give as clean a cut as a sharp knife against a steel rule into a cutting mat. To distinguish it from that I do not use the word cut. To use the phrase paper-knife-cut is too cumbersome ~ and not quite accurate if I use a kitchen knife ~ and who owns a paper knife these days? I have one at home, but it is hopelessly blunt. Adverbs such as tearing ~ ripping ~ hacking ~ slicing ~ do not sound neat enough, although slicing might have done.
A paper-knife-cut edge ~ a cobbled edge ~ has a slightly rustic look. I chose the word cobble because I find that cobble-edging is the best finish for some jobs. Because the cobbler's knife is often my preferred tool. I use my cobbler's knife a lot. It is efficient ~ it gives a neat result ~ it is often easier than alternatives. I list links to some uses, below.
I find that cobbled edge complements the deckled edge of handmade papers very well. To me the mix of guillotine-cut-edge and deckled-edge on the same sheet of paper ~ looks odd.
I find the best tool for careful 'paper-knife' working is a cobbler's knife .
A ~ minor ~ advantage of cobble as a base word is that it can be used as a noun, verb,or adverb. A ~ minor ~ disadvantage is that I am talking a load of cobblers. Oh dear!
~ A blunt knife ~ for example an everyday table knife ~ or an old-fashioned paper knife ~ is great for cutting thin paper or any light non-fibrous material.
~ Cutting rolls ~ this is especially useful when cutting from a roll of brown paper. By unrolling some paper, and folding it accurately back on itself ~ edge to edge ~ we obtain a perfect right angle, and a good crease to work with.
~ For thicker ~ strong ~ rolled materials I use the same right-angle technique, but I need to use a sharper knife. Rolls of bookcloth ~ laminating film ~ or tough, handmade papers ~ come to mind as examples. For these a blunt knife is either very hard work ~ or badly tears the material.