Not printing Colour

Is it possible that you accidentally put the wrong colour cartidges in the wrong spots? Otherwise, it should work fine. Also, the printer's default is usually to print in colour, therefore even pages in black and white will usr colour, which uses up coloured ink. Always check the prooerties when printing to switch to b&w:)

Yes, the black cartridge could very well be the issue. In fact, I think it's likely.

It could be the print setting on your computer.
If you're using Windows, with your document open, go to File > Properties/Preferences. In the Print Setup tab, make sure to select "Print using all available ink" in the Ink Use section.
On Mac you can select Color in Print Setting in any expanded print dialog.

DocuColor 1632 can print on:

Plain paper (A4/210 x 297mm LEF):

? Black and white: 32 ppm; colour: 16 ppm

Transparency:

? Black and white: 13 ppm; colour: 7 ppm

Heavyweight 1 (106 to 169gsm):

? Black and white: 13 ppm; colour: 8 ppm

Heavyweight 2 (170 to 220gsm):

? Black and white: 8 ppm; colour: 8 ppm

If I could be of further assistance, let me know. If this helps or solves the issue, please rate it and give a testimonial for my response

Thanks, Joe

It could be that the cartridge has become dry.
you have to try several head cleans using the printer software and if that doesnt help then the cartridge needs to be replaced.

Please check if your Colour Ink Cartridge is not emply. If their's ink in the cartridge then try to service your printer through the Print Preferences. Your Colour Cartridge Nozzels could have been blocked thats why your printer is unable to print in Colour.

In case if both the above doesn't work then check in the Print Preferences that you should not have saved the option of PRINT DOCUMENT IN BLACK ONLY. hope this helps , AJ

The cartridge may be defective. I had that happen so I returned for another and it worked fine

Whilst you rarely print in colour, its important to know that you should try to print in colour at least once a week. This will reduce the risk of your colour nozzles blocking up.

Many people have gone out to replace their 'hardly used' colour cartridges when they dont work, thinking that they have dried up, when infact its simply blocked nozzles.

If you want to keep your colour nozzles and ink ready to run, just do a full colour alignment every 1-2 weeks. Minimal ink usage there and you keep your Canon MP780 running well!

I have the same problem with my printer. But it will print in colour both testing and normal. hope someone can help soon I'm lost without it.

The paper you print on is not relevant. What happens is the green tint is the actual printer delivering all the colours to give a 'composite' black. On shiny photo paper this is emphasized where as on plain paper the colour is absorbed and shows as intended. So what can you do? Move away from black and go for a tint such as sepia.