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They are likely dry mounting the Kodak metallic print onto the mount board.
A mat that has a window cut in it so the photo shows and the mat serves to keep the print from contacting the glazing. Using a mat in front means needing a frame larger than the image. A mat in front of the image also helps visually separate the image from the wall wher the framed photo hangs.
If there won't be a mat in front, they make spacers that keep the glazing away from the print.
That will shorten the life of the print, even if the mount board is of archival quality. Over time the mount board will absorb contaminants from the atmosphere and the acidity of the mount board will increase. Since the print is stuck to the mount board the mount board cannot be replaced and the more acid it becomes the quicker the print will deteriorate.
A mat that has a window cut in it so the photo shows and the mat serves to keep the print from contacting the glazing. Using a mat in front means needing a frame larger than the image. A mat in front of the image also helps visually separate the image from the wall wher the framed photo hangs.
If there won't be a mat in front, they make spacers that keep the glazing away from the print.
That will shorten the life of the print, even if the mount board is of archival quality. Over time the mount board will absorb contaminants from the atmosphere and the acidity of the mount board will increase. Since the print is stuck to the mount board the mount board cannot be replaced and the more acid it becomes the quicker the print will deteriorate.
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