abstract
alloy
aluminum
art
background
banner
bar
board
border
construction
copy
design
format
frame
framework
gray
grunge
hard
industrial
industry
iron
layout
line
map
material
metal
metallic
old
pad
page
panel
pattern
piece
plate
polish
screw
shine
silver
space
stainless
steel
stripe
surface
tablet
template
texture
wall
world