BTW (and FYI for those reading this thread who are less experienced), in reviewing some of the responses, it seems to me that some are inadvertently confusing "test strips" with "test prints". I believe the OP was posing the question regarding the cutting of enlarging paper (test strips) to determine either general print exposure or specific areas in need of dodging or burning, in order to avoid the "wastage" of an entire sheet of paper (not my preference).
A test print, whether by printing device or the simple overlay of a burn card, is made by over exposing a single sheet of paper, of the desired enlarged size, to progressively greater, uniform, amounts of light in order to determine base exposure for the entire print, as well as areas in need of either additional light (burning) or withholding of light (dodging).
It will all get you to the same place, sooner or later, easier than not, more or less expensively, depending on preference.
Last edited by ROL; 08-16-2012 at 11:44 AM. Click to view previous post history.