Printing B/W images on an inkjet with Photoshop
Specifically printing on an Epson 800. I have some semi-Hi-Res (2400
DPI) Black and Whites I scanned on my Minolta Dimage Dual.
To the best of my limited photoshop ability I've got the scans
contrasted and leveled the way I want them and my monitor is
calibrated via Adobe Gamma.
Now the tough part, Printing. Using Photoshop 6's Epson 800 setting
and Epson High Quality Photo Paper for printout I chose 720 DPI (max)
resolution and printed an 8x10. Not knowing if I should print it via
the colour setting or B/W, I used colour. Result was very little grain
but it was gray with very little contrast. No blacks or whites.
Next print I tried the same as above but using the black ink only
setting. This time the colour's were dead on but I got a ton of grain.
and noticeable (naked eye) pixels.
What am I doing wrong? Is the 720 DPI not enough to produce a good
looking 8x10 ? Am I supposed to be using the black ink or colour ink
#1. "RE: Printing B/W images on an inkjet with Photoshop" | In response to Reply # 0Mikepoison Basic MemberThu 04-Jan-01 08:03 PM
Try formatting the image to 720 dpi first:
Image - resize - then set the DPI to 720, and then resize the image so it fits on the paper.
Also, is the image grayscale or color? Try casting the image to a grayscale image (images-mode-grayscale) before printing, and test whether that's better on a piece of regular print paper first =)
"The world will not be quantified on celluloid... But I'll be damned if I don't try!"
#2. "RE: Printing B/W images on an inkjet with Photoshop" | In response to Reply # 1Kelvin UK Basic MemberFri 06-Jul-01 03:21 PM
If your image is colour, I wouldn't recommend converting to greyscale. Greyscale has a lower bit-depth. Personally I always use the desaturate tool, this keeps the complete tonal range.
As for printing, I always select B+W on my Epson 880, the tonal range is heavily reduced due to the way inkjet printers work. A B+W print is made up of various size dots (all pure black) dithered to form the final print. A way to improve this situation is to replace the colour cartridge with a grey-scale variety. This gives a lot more depth to the image. The only supplier of these carts that I know of (in the UK) is: www.lyson.com Lyson describe these carts as small gamut and manufature for the Epson 800. I use an Epson 880 (not available yet) so cannot verify the print quality but logic says that the results should be a lot better.
I use a coolpix 880 and always shoot in colour. If I think the image would be better in B+W, use photoshop to desaturate and print in B+W. The results are acceptable at 2800 dpi on photo glossy film but still lack a bit of depth. As soon as Lyson produce for the Epson 880 I will give them a try.
Hope I have been of help
#3. "RE: Printing B/W images on an inkjet with Photoshop" | In response to Reply # 1BJNicholls Charter MemberFri 06-Jul-01 04:26 PM
LAST EDITED ON Jul-06-01 AT 08:31 PM (GMT)
What are you trying to achieve by oversampling to 720 ppi? The maximim image resolution the printer can render is approximately 300 ppi. The output resolution of the printer and pixel pitch of the image are not equal numeric values.
Oversampling will always result in some loss of image quality and should be avoided whenever possible.
Even an Epson printer with a nominal 2880 dpi resolution can only render detail that equates to about 300 ppi of image resolution. You are better off avoiding oversampling until your images start to show visible pixels at something less than 200 pixels per inch image resolution.
The black and white mode from the Epson driver will be much more coarse than 4 or 6 colors from a photo printer. The reason is that you get only black dots from the black ink cartridge instead of creating tones using the other colors. Each black dot is much more contrasty than a dot of cyan, magenta or yellow.
However, it is very difficult (I may even suggest impossible) to create truly neutral greys using CMYK printing. You may be able to get a rendition that is pleasing, but there will always be some color hint in a CMYK print. CMYK will provide much smoother tonal range, finer detail and less visible dots than black only.
Folks who are serious about doing black and white prints on 4 color photo inkjet printers use special quadtone monochrome inks (hextone or "sixtone" on 6 color printers). These inks give the printer at least four shades of grey to render greater tonal range with less visible ink dots. Quadtone inks are offered in cool, warm and neutral sets to simulate popular silver based paper casts.
Here's a link if you're interested in these inks: