Rives Advantages: This paper has a beautiful creamy color and texture. It also rips easily to create lovely edges. If you like to use white space as a design element, your collages will look at least 20% better on BFK as opposed to a standard mixed media paper like Strathmore. It's basically like putting a Spanx on your work (collage or drawing).
Rives Disadvantages: Because this is a printmaking paper it will stretch when it gets damp, whether or not you are using a press. The area where you adhere your collage papers will not stretch at all. This can result in some major buckling. Once the wrinkles set it they are pretty much permanent.) I did have some luck re-dampening and ironing my collages on the reverse side.)
Takeaway: When using a printmaking paper like Rives BFK use the "driest" adhesive you can: a light swipe of a glue stick or spray glue. Let the collage air dry quickly rather than put it under a stack of books.
I've tried pre-stretching a few sheets this week by dampening them, running them through the press and taping them to a board to dry. Will post an update.
What is your favorite paper or substrate for collage?