Copying Tips



1 Normalising to the inkjet media

Sometimes you may discover that scanning regular coated inkjet media produces a lower RGB value (appears darker) than the reading produced from the Normalisation Target used to normalise the scanner - EVEN THOUGH THE INKJET MEDIA APPEARS TO BE A BRIGHTER WHITE!  This can be due to the coating used on the media.  This may mean that any 'white' background of the inkjet original starts to appear in the area where the background is at the printer.

ANSWER:  Use the White point slider in CopySmart to alter the background in the copy OR if you are scanning to file a number of these originals it may be worthwhile normalising the scanner to the inkjet paper.  Cut a length of paper from the inkjet roll that is 42 " or 106.7cm long (Gx 42) and place it coated side down in the scanner.  Now use the Utilities program to carry out the scanner nomalisation.  


2 Use of RGB printer drivers

Hewlett-Packard larger printers can be driven in both CMYK and RGB modes whilst the smaller models accept only RGB.  In CMYK mode CopySmart must profile the printers in the normal way by producing linearisation and colour targets.  In RGB mode the printers accept sRGB data from CopySmart and matching to the loaded media and ink is carried out by the printer.  THERE IS NO OPPORTUNITY TO SELECT THE MEDIA IN THE HP RGB DRIVER.  The RGB printers appear in the CopySmart printer list in the format HP Designjet [RGB].  In tests we have found that using the CMYK drivers produce much better results than using the RGB drivers although of course the HP RGB drivers require no targets to be printed and scanned.

Canon CopySmart drivers support CMYK and RGB printing modes.  Canon CMYK printer drivers appear in CopySmart as the printer name only e.g. iPF700.  An RGB iPF700 driver will be listed as iPF700 [RGB].  Canon RGB printer drivers work in a slightly different way to HP RGB printer drivers because the media choice is still available as part of the printer configuration task.  At the end of the process the selected RGB printer is assigned an sRGB printer profile.  This profile should be changed to one of the Canon printer profiles supplied as part of the Canon Windows Printer Driver installation.  Windows printer driver profiles are found at the following location: [DRIVE}\Windows\system32\spool\drivers\color\ and usually take the form
CNNmodel#RC.ICC.  


3 Scanning / copying transparencies

To scan transparencies secure with magic tape or similar a piece of white film or paper (enough to back the entire document) to the leading edge of the item to be scanned.  Place the leading edge of the combined media into the scanner with the scanner slowed down to about 50% of normal speed (monochrome only).


4 Scanning / copying newspapers

To scan very thin reverse printed documents like newspapers it is often helpful to place a piece of black card or paper behind the document.  If this is not practical to do use the white point slider to remove the ghosting coming through from the back of the newspaper.


5 Avoiding bleached out scans and copies

Always make sure that the scanner in the case of the Gx Series has been warmed up for about 1 hour and recently normalised for the room temperature before scanning or copying delicate images with lots of detail in the white areas.  For Cx scanners they should still be normalised at the room temperature in which they are being used for maximum performance.



6 Controlling copy quality

Copy quality is controlled by 2 factors - the scanning resolution AND the printer print quality which is set in the printer driver of CopySmart - NOT IN THE WINDOWS DRIVER PRINTING PREFERENCES.   For general colour work where no enlargement is anticipated 300 dpi to 400 dpi should be used for the scanner resolution - see how  For draft copies in black and white to plain, or low cost coated paper, or where fine detail is not important (perhaps where a very fast LED printer is in use via the hot folder option - see how), it may be acceptable to maximise the scanner speed by using a 200 dpi scanner resolution.

Print quality is related to the quality setting selected in the driver configuration steps and is directly linked to the type of media chosen - see how.  It may be useful to add the same media twice e.g. as 'coated paper - high quality' and again as 'coated paper -  draft'.  The print quality used on a given media can then be changed very easily by browsing to a different media name.



7 Screen clash or Moiré

Screen clash is caused when the scanning resolution is very close to the resolution of the print process used for the original when it was first printed.  Usually increasing the scanning resolution to 600 dpi will stop this happening.