IMAGE PREPARATION TUTORIALResolution
All of the images used in your layout
should be at least 300ppi (pixels per inch) at the size they will be
printed. Images with less than 300ppi will appear pixellated ("chunky")
and of poor quality. Most images grabbed from the internet have a
resolution of only 72ppi and while they may look okay on your screen, they
will look terrible in print. Your monitor has a resolution of between 72
and 96 ppi. To preview how an image will look when printed, zoom in 400%
on your image. This will give you an approximation of how your image will
look printed.
You can not artificially add image
resolution. Simply scaling up an image to the size you want will not
increase an image's resolution. See the examples below.
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300 ppi Image:
Looks nice and sharp |
Sharpness
stays even zoomed in 400% |
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100 ppi Image:
Not enough resolution |
Lack of
resolution obvious at 400% |
100 ppi Image
scaled up to 300 ppi: Blurry |
How to check and
change your image resolution
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- Make
note of the width and height of your image in pixels (pixel dimension).
- Unclick on the "Resample Image"
box. This will not allow the Pixel Dimensions to change.
- Change the value of the resolution
field to 300 pixels/inch.
The dimensions shown in the Document Size
box indicate the largest size your image can be and have enough resolution
to print properly.
If there is not enough resolution in your
image for the size you need, you will need to locate a higher resolution
image to use in its place.
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CMYK v. RGB
Your images must be saved as CMYK to
print properly. Most images that are created by scanners, digital cameras,
stock image cd's and stock image websites are RGB and must be converted to
CMYK before they are used in any layout. Please note that if you fail to
convert the images yourself, ValPrint must convert your images before your
job can be printed. There is always a color shift during this conversion,
so if you do not convert your image files prior to upload, your printed
piece will not look the same as what you saw on your monitor. Depending on
the color values in your images this color shift can be quite dramatic. To
change your color mode in Photoshop, see below. Remember to resave your
new CMYK file and update your image links in your layout application.

Bleed
If your design includes color or images
that you intend to go all the way to the edge of your printed piece, you
must include bleed. Bleed refers to extending your art 1/8" past the trim
area of your document. All of our templates clearly indicate the bleed
area. If your image is not white on all four sides, you MUST include
bleeds in your files. Add a quarter of an inch (.25") to each dimension to
allow for cutting. For example, for a 4" x 6" post card with full bleed,
the image size should be submitted at 4.25" x 6.25". .125" (1/8") on each
edge of the card will be trimmed off during the cutting process. This will
leave you a 4" X 6" standard post card. See examples below.
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| Example:
Postcard without bleed; note white border around image |
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Example:
Postcard with bleed. The red box indicates the bleed
area, the black box shows the trim line and the blue box
indicates the safety area for type.
We have templates available for free download that indicate bleed area, trim lines and safety areas for the most common project sizes. Click here. |
Formats: EPS, TIF,
JPG.
Once you have converted your images to
CMYK and verified that they have the proper resolution, save your images
in either EPS or TIF formats. We prefer that you do not save your image
files in JPG format as the compression scheme of JPG will result in loss
of image quality. If you must use JPG, make sure it is saved with the
quality setting at its highest value. Never use images in GIF or BMP
formats as we will not be able to process your file.
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