https://community.usa.canon.com/t5/Professional-Photo-Printers/Canon-Pixma-pro-100-Ink-how-to-identify-the-black-cartridges/m-p/127115#M1417 <P>I think you are out two cartridges. I have studied mine and see no difference other than the label.</P> Mon, 01 Dec 2014 18:02:38 GMT jrhoffman75 2014-12-01T18:02:38Z https://community.usa.canon.com/t5/Professional-Photo-Printers/Canon-Pixma-pro-100-Ink-how-to-identify-the-black-cartridges/m-p/126996#M1416 <P>I just started putting a new Canon Pixma Pro 100 printer together- I was not thinking and removed two of the grey (light), and grey cartridges labels. Now I do not know which to put in the slots, I cannot see any gradient by holding them up to the light, and the actual cartridge is not marked. I am soooo dumb, any suggestions.</P> Mon, 01 Dec 2014 14:30:57 GMT https://community.usa.canon.com/t5/Professional-Photo-Printers/Canon-Pixma-pro-100-Ink-how-to-identify-the-black-cartridges/m-p/126996#M1416 mlevick 2014-12-01T14:30:57Z https://community.usa.canon.com/t5/Professional-Photo-Printers/Canon-Pixma-pro-100-Ink-how-to-identify-the-black-cartridges/m-p/127115#M1417 <P>I think you are out two cartridges. I have studied mine and see no difference other than the label.</P> Mon, 01 Dec 2014 18:02:38 GMT https://community.usa.canon.com/t5/Professional-Photo-Printers/Canon-Pixma-pro-100-Ink-how-to-identify-the-black-cartridges/m-p/127115#M1417 jrhoffman75 2014-12-01T18:02:38Z https://community.usa.canon.com/t5/Professional-Photo-Printers/Canon-Pixma-pro-100-Ink-how-to-identify-the-black-cartridges/m-p/128115#M1472 <P>You &nbsp;got a 50/50 chance. &nbsp;Go for it! &nbsp;<img id="smileyhappy" class="emoticon emoticon-smileyhappy" src="https://community.usa.canon.com/i/smilies/16x16_smiley-happy.png" alt="Smiley Happy" title="Smiley Happy" /></P> Sat, 13 Dec 2014 17:18:41 GMT https://community.usa.canon.com/t5/Professional-Photo-Printers/Canon-Pixma-pro-100-Ink-how-to-identify-the-black-cartridges/m-p/128115#M1472 ebiggs1 2014-12-13T17:18:41Z