This is a traditional technique for photo mounting to place one or more layers of mat board between the photo and the transparent plexiglass face board for better protection of the photo.
      There are mat boards of different color and level for selection to enable the selected mat board with the frame to set off the color, style of the picture. We have different classes of mat boards in reserve ranging from the economic class up to the high class of acid-free mat board for museum exhibit to meet your requirement.