DUOTONE 
    
 
    
A poster is considered "duotone" 
      if it is printed using only two colors (usually black with another color 
      on a white background). 
    STUDIO-ISSUED/NSS DUOTONE MATERIALS
    Duotone materials, particularly  
      one sheets, were initially introduced by major movie studios for the 
      purpose of providing promotional materials that were less costly to film 
      exhibitors than the full color posters. They were also great for cutting 
      advertising costs on low-budget films produced by both major and minor motion 
      picture studios. The studio-issued duotone materials were used extensively 
      on military bases.
    These duotone materials usually feature 
      the same artwork as the full color counterparts, only in two colors. They 
      will normally include the same credit and print information, but will not 
      have the NSS number or  
      NSS tag line.
    SECONDARY PRINTERS DUOTONE MATERIALS
    Several independent printers introduced 
      a line of primarily duotone window cards as 
      an inexpensive alternative to the National Screen Service 
      materials. These duotone materials were particularly attractive to small 
      city and rural theaters. Window cards were made for mass distribution to 
      be placed in retail and office windows, posted on utility poles, nailed 
      to fences, etc.. As such, many theatres and movie exhibitors found these 
      duotone window cards to be extremely cost effective. The three most prominent 
      of these  secondary printers were: (1) Benton 
      Card Company; (2) Hatch Card Company; and (3) 
      Globe Card Company. 
    The duotone window cards released by 
      the independent printers may contain the same artwork as the NSS window 
      cards, but they usually have their own unique artwork. The name of the printer 
      is normally printed somewhere in the bottom border of the window card.
    ARE THEY COLLECTIBLE?
    The value assessed to duotone materials 
      by most movie collectors depends upon which category the materials belong. 
      If a movie studio released duotone materials along with color versions of 
      the same paper, then the duotone versions will not command the same dollar 
      value as their color counterparts. Most collectors prefer the full color 
      over duotone, if both such versions exist. If, however, the duotone posters 
      are the only ones released with the particular film in question, 
      then the value of these materials would be based on standard "supply 
      and demand" theories.
    Original duotone materials released by 
      independent or secondary printers are generally considered collectible. 
      However, most collectors do not consider them as desirable as the color 
      versions released either through NSS or the movie studios. Even when the 
      artwork and colors are identical, there can be major differences in the 
      prices for materials produced by independent printers and those issued through 
      NSS or the movie studios.