Answer:
"Matrices for printing types were made of copper. However, in printmaking the matrix is whatever is used, with ink, to hold the image that makes up the print, whether a plate in etching and engraving or a woodblock in woodcut."
The blues is an older word for R&B. Blues artist use different types of instruments to make a unique rythem.
They are coffins from the Bronze Age used for burial practice, similar to the Tombs of Egypt in that sense.
