Halftones are any images that contain gray. When using gray, make sure to use gray levels between 20% and 80%, with at least 20%
difference between the levels of gray, or it may become difficult to distinguish between different elements in your figure (see
example at the University of Chicago Press website, http://www.journals.uchicago.edu/page/aje/msprep-art.html). Use a screen of 80
lpi or lower (coarser) and make the figures as close to final publication size as possible, as reduction can cause levels of gray to drop
out. Whenever possible, use different patterns of hatching instead of grays to differentiate areas of a figure. Optimum resolution for
halftones is 300 dpi when sized appropriately for print publication.
Photomicrographs should show only the most pertinent area of the material being studied. A micrometer bar or appropriate scale
marker must appear on the figure.
Figures that are intended to be printed in color should be prepared as CMYK (i.e., four-color) files, not RGB files (see example at
the University of Chicago Press website, http://www.journals.uchicago.edu/page/aje/msprep-art.html). RGB files cannot be used for
printing and must be converted to CMYK, which can result in undesirable color shifts. If authors cannot provide four-color files, the
Press will convert the files from RGB to CMYK. In addition, authors should transmit a hard copy of each color figure as a sample of
how the colors should look in the printed journal. This is needed because the appearance of a color figure is highly device
dependent, and the Press and the printer need to know what colors the author has seen and approved. Optimum resolution for
CMYK files is 300 dpi when sized appropriately for print publication. CMYK Encapsulated PostScript (EPS) files created with Adobe
Illustrator and Photoshop seem to produce the best results.
For journals that do publish color art in the print edition: Please note that reproduction of color images carries an extra charge.
Contact the journal office for current rates. Unless explicit arrangements have been made with the journals editorial office, you will
be charged for color reproduction if your figure contains any color at all.
For journals that do not publish color art in the print edition: Art may appear in color only in the online version of the journal.
Black-and-white versions will be used by the publisher for the print version. For this reason, if you are transmitting artwork in color
please make sure that the colors you use will work well when converted to grayscale. Use contrasting colors with different tones
(i.e., a dark blue and a dark red will not work because their tones are too similar; when converted to grayscale the resulting grays
will be almost identical).
GUIDELINES FOR PREPARING DIGITAL ART FILES
Figure files should be in TIFF or EPS format. EPS files saved by a commercial-quality graphic program (such as Adobe Photoshop,
Adobe Illustrator, or Kaleidagraph) are generally the most reliable. Authors should avoid using applications that cannot save directly
in TIFF or EPS format.
Each figure must be a separate file. If you have a multipart figure, the Press prefers to receive these as a single file, with panels
labeled within the image, rather than as multiple files. However, if necessary you may transmit each part of the figure separately,
along with a README file describing how they should be laid out. If a figure is assembled from multiple images, the images must be
embedded in the file, not linked.
Make sure that figures intended for black-and-white reproduction do not contain any color objects. Although color figures usually
print acceptably on black-and-white laser printers, unexpected color images will disrupt the printing process, resulting in publication
delays. If figures contain any color lines or color objects, the author may be charged for color, even if color was not requested.
All videos must be in MPEG, QuickTime, MP4, or AVI format. For each video file that is submitted with a paper, the author must
provide a still from the video published as a figure. This allows readers to have a printed representation of the animation.