Links in the PDF article version are coloured to improve screen readability and
navigation. The links appear in pale grey when printing the document monochrome.
In this case please use the PDF version optimized for black&white printout instead.
Some problems are reported when printing PDF documents from Acrobat Reader under
Windows, especially for machines using PCL printer drivers instead of PostScript
drivers. PCL (Printer Control Language) is the language of LaserJets and DeskJets
(both produced by Hewlett Packard) and compatible laser printers, which are often
referred to as non-PostScript printers. For a comprehensive troubleshooting guide
for PDF printing issues, please refer to the
Adobe Support Knowledgebase.
If the printed document happens to contain corrupted equations or text passages,
it may help to choose "Postscript Level 1" instead of "Postscript Level 2" in printer
options when printing from Acrobat Reader 4.0 or 5.0 under Windows.
Please, contact us should you encounter problems using our articles.