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 Page Location: Home > Training > Information Sheets > #04 Imaging Screens with RISO SP-275 ScreenFax
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SP-275 operation manual: Section 4
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Imaging with SP-275 ScreenFax

Artwork Types and Preparation
As with all RISO systems your design MUST be carbon based:
  1. Hand drawn with RISO Artwork Pen

  2. Off set printed with carbon ink - RISO design books

  3. Photocopy

  4. Laser Print from a computer

SP-275 Clean-Up Procedure

The SP-275 system, can be used to perform a clean-up of excess carbon from your artwork - useful where solid/ bold areas are present - to further prepare your artwork.
Flashing your design against Clean-Up Paper removes excess/ ridges of carbon present on your design - ideal for all laser prints.

Cleaning Up your artwork in the SP-275

1. Turn on the SP-275 to a setting of 5 in the PPC range
2. Cut out 2 pieces of Artwork Clean-Up paper, slightly larger than your design area
3. Place the Clean-Up Paper down over the SP-275 Stage Glass (both sides of the paper are the same)
4. Place your artwork over the paper, face down, so as the paper covers ALL your design area.

NB: If your paper does not cover the design area and the image the design, you risk burning the design into your Stage Glass - avoid this at all costs. Place a piece of white paper over the design if the Clean-Up Paper does not cover all areas.

5. Push the handle down to flash the machine, lift handle and remove artwork/ paper
6. Gently peel the Clean-Up Paper off the design
7. Repeat steps 3-6 on the second piece of Clean-Up Paper

If the second piece removes a heavy load of carbon this process can be repeated a third time.

Imaging & Creating Screens

The final setting for imaging your artwork can vary as artwork type, temperature, humidity and RISO ScreenMaster type all influence the imaging setting.
* The PPC range is a lower range than the NON-PPC settings. 5 PPC is approx. 1 NON-PPC
Imaging photocopy designs using the a NON-PPC setting is not outlined in the RISO Operation Manual, however testing in the Australian environment has proven perfect results are attainable.

The following should be used as a guide only for machine setting.

Photocopy & Hand Drawn - Clean-Up twice @ 5 PPC - Image once @ 2 NON-PPC

Laser Print - Clean-Up twice @ 5 PPC - Image once @ 1.5 NON-PPC Check if design requires additional flash

RISO Artwork Book - Image once @ 6 NON-PPC Check if design requires additional flash

How do I know if the setting needs to be increased?
After you have imaged the design, look at it. Before you peel back a corner, look at the entire design area - does it look patchy, has all the film been exposed?
Peel back a corner - DO NOT REMOVE MORE THAN HALF THE DESIGN - Look at the design, is it a clear image? - hold it up to the light.
When the design area is not clearly imaged [mesh strands visible in solid areas] maintain the same setting and image again.
If there is still film to be exposed and the design is clearly underexposed, increase the setting.

VERY IMPORTANT NOTE: When using the NON-PPC setting NEVER increase by more than 1 before flashing and re-testing.

Once you settle into a routine of using a set type of artwork in a controlled environment you will not normally be required to alter your machines settings.

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