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Greg R. Nunn
the preform will need more grinding attention than others. As with creating
short.
Grinding the handle of the preform is not necessary, nor was it elaborate
(Fig. 1) has occasional grinding striations, due to haphazard contact during
Grinding contact on the handle did not pose a problem for the Neolithic
knappers because the completed daggers were sometimes covered with a
wooden handle or other coverings (Jorgensen 1992; as per Apel 2001:254).
Detail of grinding process
When grinding, one takes long strokes in a back and forth motion along
beginning at the lower end closest to the person grinding, pushing forward
to the opposite end of the grindstone then pulling backwards to the person
grinding. Grinding in this manner will result in contours comprised of con
sistent lenticular cross sections. In addition, facets and concavities will be
prevented.
Hold the dagger handle in one hand and the distal portion of the blade in
the lateral margin edge farthest from you (Fig. 5). Apply pressure and push
the preform away toward the opposite end of the grindstone. When pushing
away, gradually rotate the biface in an arching manner so that when the biface
reaches the opposite end of the grindstone, the margin closest to you will be
making contact with the grindstone. Next reverse the stroke by pulling the
biface backward toward yourself. Once again, rotate the biface gradually in
an arching manner, so that when the biface returns to the starting position,
the lateral margin farthest away will be making grinding contact with the
grindstone. Most all the surfaces will be making contact during each stoke.
cm long. A stroke is the total of 100 cm. In addition, it will take a consider
lateral margin will again become thinner. Toward the completion of grind
able to decrease grinding pressure when grinding around the margin. One
can stop using quartz sand and grind in a gentler fashion so as not to chip
100