tray-sheetn. a sheet of sheet-iron to be made into a tray.
ΘΚΠ
society > occupation and work > materials > derived or manufactured material > metal > iron > [noun] > type of iron > sheet iron > other types of sheet iron
black sheet1850
tray-sheet1891
1891 Daily News 9 Nov. 2/6Tray sheets for stamping purposes.