Railroad Board is smooth 2-sided colored poster board that every school teacher or creative should have in their collection. This set from School Smart comes in a range of hues (from) in a 4-ply thickness and can be used for bulletin boards, signs, tickets, tags, and more. Smooth front and back is great for stenciling, block printing, or mounting. Takes paints, markers, glue, glitter, and more well, without bleed-through.