u2122 transparent tape 600 upc 021200 6943 3 4 inch 19 05 millimeters width on a working surface such that the adhesive side is uppermost the tape type should not shatter in liquid nitrogen 4 cut three 5 8 inch or 15 87 millimeters wide by about 2 34 or 50 8 millimeters long specimens from the sample such that the long dimension is parallel to the machine direction 5 place the specimens on the tape in an aligned stack such that the borders of the specimens are within the tape borders see fig8 specimens which adhere to the tape will not be usable 6 place another length of tape of about 5 inches or 127 millimeters on top of the stack of specimens with the adhesive side towards the specimens and parallel to the first tape 7 mark on the upper surface of the tape which is the upper surface of the specimen 8 make twelve specimen sandwiches one photo will be taken for each specimen liquid nitrogen is used to freeze the specimens liquid nitrogen is dispensed into a container which holds the liquid nitrogen and allows the specimen sandwich to be cut with a razor blade while submerged a vise.