Terminology:
Images are bitmaps of photos or scanned images, These
are called bitmaps because they are a set of color dots (pixels
when displayed on screen and "halftones" when printed,
typically these are photoshop .tif files) When enlarged the dots
become bigger, see further info below.
Graphics are vector drawings which are a set of
mathmatically defined "objects" lines, circles, boxes,
etc.These are typically logos or drawings from Illustrator .eps
files. These can be enlarged to any size with out loss of definitions
since they printed at the resolution of the output device.
Don't
get freaked out by the math below, its easy.
We
recommend you design your document at no less than 1/4 of the
final size, and no more than 1/2 final size. Quark documents cannot
be enlarged beyond 400%
For
example: A 24x36 poster could either be designed on a page size
of
- 12"x18" document (1/2 final size) and requires a 200%
enlargement.
- 8"x12" document (1/3 final size) and requires a 300%
enlargement.
- 6"x9"
document (1/4 final size) and requires a 400% enlargement
This
is simpler than it may sound at first, just divide the final size
you require by 1/2, 1/3, or 1/4 to determine the document size.
If
you already have a document composed determine the % enlargement
required by using the handy calculator
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is
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INSTRUCTIONS
You
will be able to calculate only one dimension at a time.
If you enter original height, then you must enter desired
height. Then try the width, most likely you will get two
different percentages unless you composed the original document
to the exact correct proportions. If you require exact final
dimensions in both height and width you need to adjust the
document size of the original .
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Image
resolution: For best results the output size of images should
be at least 100 dpi and preferably 150-200 dpi. Check this by
dividing the dpi of the original image by the percentage (as a
decimal number) of the enlargement. Example if your original image
is 200 dpi and you require a 250 % (thats 2.5) enlargement then
200dpi/2.5 = 80 dpi in the final image
slightly
under optimal resolution so you should use a 300dpi original.80
300dpi/2.5
= 120 dpi in the final image
Control
color for any scanned files in the software they originate in,
recoloring scans in your composition software can cause unexpected
results. Stretching/shrinking an image can cause pixel distortion
and is not recommended.
We
can print from either CMYK or RGB image files. We recommend supplying
RGB image files for optimal output. Conversion of images to CMYK
is not desirable for inkjet printing, as is required when going
to press.
However, Text portions of your document print best with CMKY colors
NOTE:
To avoid banding in filled areas of black, define black as follows:
C=10 M=10 Y=10 K=100 (never define text as 4-color black unless
> 24 pt.)
Control color for any scanned files in the software they originate
in, recoloring scans in your presentation software can cause unexpected
results. Stretching/shrinking an image can cause pixel distortion
and is not recommended.
Powerpoint
is not actually intended for large-format printing - its primary
use is for screen presentations or for 35mm slide output. Expect
small inconsistencies when enlarging from PowerPoint. Problems
can include text shifting or wrapping to the next line. This is
normal and unavoidable. Please keep this in mind when printing
large-format from PowerPoint. Also, when designing in PowerPoint,
never "copy and paste" image graphics into your file. Always "insert
as picture" - preferably .tif. (stay away from .eps .jpg, .bmp,
and .pct files)
