A macrograph or photomacrograph is an image taken at a scale that is visible to the naked eye, as opposed to a image, taken with a microscope. It is sometimes defined more precisely as an image at a scale of less than ten times magnification.[ Macrograph EngNet Engineering Dictionary]
Materials science
This term is often applied to a three-dimensional image taken of a material using a low-power
stereomicroscope. These images are used in materials science, particularly in the study of
in metals.
[ Metallographic examinations TEC Eurolab, Accessed 12 May 2008] This method can also be used to assay the fine structure of steel, in a standardized test called the Baumann method that creates a
sulfur print showing the amount and distribution of sulfur inclusions through the metal structure.
[Arthur J. McEvily (2001) Metal Failures: Mechanisms, Analysis, Prevention Wiley-IEEE p 90 ]
