What is 600e DPI

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What is 600e DPI?
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600 Dots Per Inch

• Does RISOs RZ Series 600e dpi resolution
  actually meet a 600 x 600 dpi specification?
• The simple answer is YES! But we should be clear
  that 600e dpi actually emulates true 600 x 600
  dpi.

600 dots
600 dots
If a 1 square area were completely filled with
dots, there would be 600 dots across and 600 dots
down.
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Whats the Difference?

• True 600 dpi
• Each dot is individually controlled (both across
  and down) and perforated in the master where
  required to complete an image.
• 600e dpi
• Dots are individually perforated down the image
  (true 600 dpi)
• Dots are perforated in pairs across the image,
  emulating true 600 dpi.
• An algorithm is used to determine whether to burn
  a pair of dots in a specific location to
  replicate the scanned image. While they are
  controlled in pairs across the image, the size of
  the dots is exactly the same in both directions
  which results in better output.

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Whats the Difference?
The more dots there are in a defined area, the
smaller the dots will be resulting in higher
resolution and smoother edges.
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Examples of various dpi
300 x 600 dpi
Larger, elongated dots and less of them make the
edge of the character appear more jagged.
True 600 x 600 dpi
300 x 300 dpi
Larger dots and less of them make the edge of the
character appear more jagged.
Emulated 600e x 600 dpi
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True 600 dpi vs. Emulated 600 dpi

• True 600 x 600 dpi

600e dpi
What happens? 600e positions the dots in pairs.
An algorithm is used to decide where the pairs
should be placed. The pink dots have been dropped
and the light blue dots have been added to
complete a pair.
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Dot Size
The area in the squares is the same. The number
and size of the dots that fill the area vary.
600e x 600 dpi 2 perforations 4 dots
600 x 600 dpi 4 perforations 4 dots
300 x 300 dpi 1 perforation 1 dot
300 x 600 dpi 2 perforations 2 dots
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Resolution Magnified View of Perforations in the
Master Material
The area in the squares is the same. The number
and size of the dots that fill the area vary.
600dpi
400dpi
600e-dpi
300dpi
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Magnified Comparison of the Perforation Sizes
600 600 dpi
300 300 dpi
600e dpi 600 dpi
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Q A

• Are the RZ310, RZ390, and RZ590 600dpi machines?
• Yes.  They create 600 holes in each direction in
  a 1 inch area but, in one direction (across) the
  holes are perforated in pairs emulating true 600
  dpi.
• Are the RZ310, RZ390, and RZ590 true 600dpi
  machines?
• They are 600dpi machines, but control dots in
  pairs across the image, rather than single dots
  which is why we refer to it as 600e-dpi.  In
  other words, depending on the image, you might
  see some differences.
• What difference will you experience by comparing
  a 600e-dpi to a true 600dpi image?
• You will see little difference when you compare
  standard text documents.  However, you will see
  some difference when comparing fine lines and
  pictures.  Overall, the image quality of 600e-dpi
  is better than true 300dpi, but less than true
  600dpi image.
• How much is the image improved from a RN machine?
• RN resolution is 400dpi x 300dpi, creating
  120,000 dots in 1 square inch area.  The RZ310
  and above has 600e-dpi x 600dpi resolution,
  capable of creating 360,000 in 1 square inch
  area, and controlling 180,000 pairs of dots. The
  more dots there are in a defined area the better
  the quality of the output.

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Thank you!
Four of us are better than one of you!
Remember The more dots per inch, the higher the
resolution. The higher the resolution the better
the image!