Egyptologists in the early twentieth century thought that politically motivated changes like these were the principal reason for the contradictory imagery in Egyptian myth. However, in the 1940s, Henri Frankfort , realizing the symbolic nature of Egyptian mythology, argued that apparently contradictory ideas are part of the "multiplicity of approaches" that the Egyptians used to understand the divine realm. Frankfort's arguments are the basis for much of the more recent analysis of Egyptian beliefs.  Political changes affected Egyptian beliefs, but the ideas that emerged through those changes also have deeper meaning. Multiple versions of the same myth express different aspects of the same phenomenon; different gods that behave in a similar way reflect the close connections between natural forces. The varying symbols of Egyptian mythology express ideas too complex to be seen through a single lens. 
Amarna: In the excavations at Amarna, Lisht, and Malkata at the beginning of the 20th century, Petrie uncovered two types of vessels that he suggested were used in antiquity to make Egyptian blue: bowl-shaped pans and cylindrical vessels/saggers. In recent excavations at Amarna by Barry Kemp (1989), very small numbers of these “fritting” pans were uncovered, although various remaining pieces of Egyptian blue ‘cake’ were found, which allowed the identification of five different categories of Egyptian blue forms and the vessels associated with them: large round flat cakes, large flat rectangular cakes, bowl-shaped cakes, small sack-shaped pieces, and spherical shapes.  No tin was found in the samples analyzed, which the authors suggest  is an indication that use of scrap copper was possible instead of bronze.