_____________ of the impression is the only method which provides a three dimensional view of the impression.
a. casting
b. photography
c. sketching
d. all of the above
Question 2
A preview of the impression photograph can be accomplished with the use of a flashlight or high intensity light shined at ____________ ____________ on the impression.
a. alternate lighting
b. an oblique angle
c. straight on it
d. not necessary