Monday, June 14, 2010

colour printing - further

Whenever we r printing a CAD drawing , we are having different situations.
  If the drg is to be printed  on  Tracing paper , generally it is preferred to print in pure black ink. Tracing paper prints are mainly used for longer storage and taking Ammonia prints (or blue prints as they are called. ) If there are large patches of solid hatch pattern in the drg, then blue prints of the same do not look right. with the ugly patches.  Also the lines crossing or overlapping the solid hatch get mixed in them. this is because only black ink is used for printing, irrespective of the colours used in the drg.these problems can be avoided by
     a. Use separate colours for the boundary of the hatch and the hatch itself. Then , in the printer setting, edit   the   ctb setting , ----- specify  a suitable shade of gray colour for the solid hatch patches and all other colours as black ink. 
     b.  Use only different  shades of gray colour for hatch patterns. This will make the ctb setting easy---- all colours as black except the grey,  for which the setting will be " Use Object Colour "
     c.   If gradient hatch patterns are used , then u will have to set the printer for " print in grayscale" option. or "use only black" setting. Otherwise gradients will print in colour.

We will discuss  printing CAD drgs in colour in our next session !!

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