Two dimensional barcodes are growing in popularity because they can encode a large amount of data into a small amount of space. One type of barcode is the stacked code. They are arranged in horizontal layers to create a multi row barcode. Matrix codes are a pattern of cells that can appear as different shapes. Data Matrix and PDF417 are 2D barcode symbologies. Please contact Photo-Graphics Co., Inc. if you require 2D barcodes on your labels. For information on materials that can accept 2D barcodes: