when i take bw laser print from corel draw, the output is not pure black. As suggested in this forum, I tried using the the 'Preserve Pure Black' setting in corel draw. But it turns out to have some adverse effect while converting image from one format to the other (like rgb to cmyk) bitmaps, the black shade on the image looked washed out in multicolor offset print.
what should i do now to get pure black output from bw laser printer without using the preserve pure black setting.
printer : hp 1020
operating system : windows 7
corel draw version : x5
Mavian said:what should i do now to get pure black output from bw laser printer without using the preserve pure black setting.
Hi,
The only way to get pure black without ticking "Preserve Pure Black" check box is to create a custom palette with following relative values as below:
You will have to switch to Grayscale from Models tab and adjust "L" values with respect to following table. The chart values is courtesy David Milisock.
problem not solved.
the black is not pure black when it is printed on my hp laser printer 1020.
If your images are CMYK, the only way to preserve black channel intact is to print them as CMYK, this require your printer to have PostScript driver. As far as I know HP 1020 doesn't have PostScript driver and Draw will be forced to convert CMYK content to RGB, at which point you will loose pure black, unless you have "Preserve pure black".
If your images are RGB, you do not really have control over black channel - it is entirely driver-depended how it will interpret RGB values. Most likely it will lay out RGB 0 0 0 as solid ink and use dithering for anything else.
In X6 there is a separate "Preserve pure black" control right in Print dialog, so one can avoid using this setting in application but just use it at print time. X5 has just a global "Preserve pure black" control that affects all the app.
WITHOUT preserve pure black setting - text, vector objects with c0 m0 y0 k100 values doesn't appear as pure black and when it is printed the black looks washed out.
WITH preserve pure black setting - the black object appears much darker and a bw laser output of the same is a normal pure black.
But i can't always turn on the preserve pure black setting, because i work with different image formats like gray scale, rgb, cmyk etc., at times i have to convert from one format to the other and the black shades in the image stays as c0 m0 y0 k100 and the output of the same in multicolour offset prints, some dark part of the image looks pure black and some part of the black looks washed out.
Can you post screenshot of your color management settings?
Tools > Color Management > Default Settings...
Or alternatively, try setting up Color Management settings as below: