This is the finishing of the inner books for those cases for exchangeable notebooks.
I bound multiple inner books at once in a double fan binding. To separate them after binding I added two sheets of waste paper to mark where to divide them.
After finishing an separating the different notebooks, those waste papers between the books and on top and bottom of the whole binding are torn off. The ones on top and bottom are just to keep the actual book body doesn’t get dirty or has any excess glue on it and tear away easy enough despite the double fan binding.
Those notebooks would not stay well in a case because the paper is not stiff enough to actually keep them in place inside the pockets, so they get card stock covers to add some sturdiness. I’m still not sure which type of adding the card stock I like best. I did a version where two sheets of cars stock are channeled and glued to the book body and the strip of cloth covers spine and cardboard from channel to channel and I did a version with a full card stock cover with four channels.
In this case I just want the area between the two outer channels covered with glue
I find the easiest way to get just a specific area covered, is by covering the area that shouldn’t get any glue like this.
Now I insert the inner book...
... and leave them between boards and weighed down to dry. ( here you can see I messed up the channels and accidentally did one at the spine in the ‘wrong’ direction. Often it’s more of a ‘what do you believe is right’ matter in what direction a channel should show, but in this case I want the material at the spine corner pressed outwards so the inner book sits neatly in the case)
Once dry they I cut them to size so they will fit snugly into their cases without too much room to wiggle around. I had only the height the same as the glued inner book an the front and back cover protruding about 5mm when I channeled the cover. Mostly because that way I get away with being a bit less accurate and the front is the edge I can easily trim.