Colour printing question please.I have to make a

chakendrick, Apr 2, 4:30am
catalogue and we have 10 pages of colour advertisements. These will be printed on a Laser printer.
The pics are 2.5mb and print out beautifully at A4 size but take a long time and use a LOT of ink. What size can each advertisment be reduced to please to get a perfectly acceptable image, but not picture print quality?

suicidemonkey, Apr 2, 4:38am
The size of the image makes no difference. if it's 2.5MB or 500kb, it's still the same image and it's going to use the same amount of ink.

Set your printer to "draft" or "normal" quality in the settings as opposed to "best" or "fine".

d.snell, Apr 2, 6:44am
I wouldn't be worrying about it to much, a laser uses Toner, not ink and the difference of the amount used between draft or High Quality is negligible.

cjdnzl, Apr 3, 3:30am
You shouldn't need to print at all, a modern laser printer should accept .doc or .pdf files on a stick. Check before you print all the images on an inkjet.

cookee_nz, Apr 3, 7:00am
Not quite so. The resolution of the image may directly affect just how much ink/toner is actually used. At 2.5mb, let's say it's been scanned at 300dpi, yet if the same image was scanned at 600dpi it would need more ink/toner to reproduce the same image than at a lower resolution. Much of this is dependent on the capability and age of the actual printer, the driver settings, whether they are using genuine manufacturer supplies (with arguably generally better quality) or oem supplies which may not be capable of delivering fine half-tones etc. More than meets the eye :-)

cookee_nz, Apr 3, 7:09am
A common mis-conception. The difference between Draft and High quality can mean anything up to triple the consumption of printer supplies. Most printer consumable usage is based on up to 5% average A4 page coverage. Increasing the quality, use of images, bold or large fonts etc will have a huge impact. It's generally recommended to default to draft for economy, and increase the quality setting as and when required, or even better, create additional quick-sets or duplicate drivers with job-specific settings - one driver for draft, another for HQ etc to save having to go into these settings each time.

suicidemonkey, Apr 3, 7:37am
I know the theory, but my experience differs.

cjdnzl, Apr 3, 7:49am
You are correct, suicidemonkey. These days most if not all inkjet printer drivers resample the image to 600 ppi (pixels per inch) regardless of the actual ppi (so the amount of ink to print an image is not dependent on the image pixel density) and print at 2,400 or even 4,800 dpi (dots (of ink) per image pixel. Each pixel is printed with 4 or 8 dots, which allows the printer to mix inks within a pixel to produce the required color and shade. Contrary to common belief, ppi and dpi are NOT the same thing. Prints do not have dpi, only printers have dpi.

d.snell, Mar 26, 8:26pm
Sorry, but the 5% coverage is based around text printing, not colour pages. A full page photo will use 100% and roughly 25% per colour if no white and and decrease % wise by the amount of white. So the toner use is more dependant on the context of the page rather than whether draft mode is selected or not. While draft mode will save a bit, in reality it doesn't increase the page count per refill by any significant amount. Also, A lot of Printers with chips will count pages and not take into account what is on the page and stop when the counter reaches 0. In a lot of cases, the Toner cartridge isn't actually empty, it's just the firmware that's telling you it's empty.

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