PRINTING

INTRODUCTION

•Resolution is the measurement of how many dots/pixels fit into one inch.dots/pixels fit into one inch.

•The higher resolution, the sharper the image will be.

•Recommends resolution: 300 dpi (dots per inch) for crisp, clear results.for crisp, clear results.

•Lower resolution images appear fuzzy, jagged and blurry.

Resolution = 300 will print

Resolution = 72 dpi will not print well

•Resolution and image size are inversely proportional to each other.

•Enlarge an image, the resolution an image, the resolution decreases; reduce an image,resolution increases.

THINGS TO AVOID

•This resolution is good for quick transmission over the internet, but is not acceptable for useover the internet, but is not acceptable for use in printing.

•Do not save images or graphics from a website to use in your print project

•The maximum print size that a digital camera can produce is directly related to the number of pixels on the camera's CCD (the resol ion)piels on the camera's CCD (the resolion)

SCALING.

•Scaling is an extremely important working tool for printing.

•There are two ways to scale an image, either during the scan, or after the scan.

Scaling to print a different size

Resolution dpi = (pixels of length) / (inches of length).

• Suppose our image is 1200 pixels wide.Contemplating printing it, we see that we could
print this image at several different sizes, simplyby changing the scaled resolution.

Example….

• 1200 pixels / 10 inches = 120 dpi
• 1200 pixels / 8 inches = 150 dpi

• 1200 pixels / 4 inches = 300 dpi
• 1200 pixels / 3 inches = 400 dpi
• 1200 pixels / 2 inches = 600 dpi

Resolution dpi = (pixels of length) / (inches of length)

Pixels ÷ DPI = Inches

PRINT VS ONLINE

• Resolution must be high
• 300 DPI for micrographs, and similar photographic-type images.
• 600 DPI for images like graphs and drawings.
• Color - Printing is done in CMYK.
• Colors outside CMYK’s gamut will not be printed.
• Remember, CMYK’s gamut is smaller than RGB’s.
• This can lead to loss of image detail when Viewing the printed image if the source was in RGB.

• Monitors display at 72 - 96 DPI, so 100-200 DPI is plenty for any kind of figure
• More than 200 DPI is overkill
• the files become very large.
• They may not display properly on a monitor.
• Color – Monitors display in RGB
• RGB contains almost all of CMYK’s colors.
• Most images, whether in RGB or CMYK format,will display color properly in online media.

PPI OR DPI


• Pixels per inch (ppi) is often (although mistakenly) used interchangeably with dots per
inch (dpi)
• Dots per inch (dpi) is a measurement describing the way an image is printed, scanned, or
displayed on your monitor. For instance, you may scan an image at 300 dpi, print a 300 dpi
image at 600 dpi, view it on your monitor at 72 dpi, but unless you resample it in Photoshop,
the image will always have a resolution of 300 ppi.