This heavy duty substrate is composed of black polystyrene foam and bonded between two vinyl sheets; the back being black and the front being white for best color reproduction. This construction creates a lightweight material with a high load capacity giving the gator board a longer shelf life and handling life than foam-core. It is easy to cut to allow for custom fitting into pre-existing displays.Upload Files:You will be uploading your file(s) during checkout, After we receive your uploaded file(s), we will review each file. If we find any problems with your files, we'll contact you. You will receive a proof within the next 24hrs after placing your order. Please use our templates to build your files correctly. Important: Prices include processing one set of uploaded files and creating a single proof.Resolution: All file formats should have a suggested DPI size of 150-200 dpi (dot per inch) resolution at 100% of the final print size. Images designed for the web typically cannot be used for printing as they have a low screen resolution of 72 dpi. Print images need to be created at 150-200 dpi or there will be a substantial drop in the image quality.Color Mode: All color artwork and/or images must be provided in CMYK (cyan, magenta, yellow, black) color mode. All black & white artwork and/or images must be provided in grayscale color mode.Bleed: For business cards and postcards, please build your print-ready digital files by adding 0.1" bleed to each dimension (or 0.05" bleed on all four sides). e.g. 36"x 48" business cards with bleed is 36.25"x 48.25" Please design your files on our templates to ensure proper bleed.