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."
Annunciation Triptych (Merode Altarpiece), Workshop of Robert Campin (Netherlandish, ca. Due to rights restrictions, ... Classification: Paintings-Panels.
$27.23 would be your answer!!!
Happy New year, hope this helps.
