Banding issue

[lin]

Do you actually mean to suggest that it is Y or C or M that is clogged rather, because the problem of the black patch is a scanner aliasing problem. Remember, the author reported having banding on black. That doesn't take a genius to guess that the black is clogged, does it? The first nozzle check scan shows good Pigmented black, CMY patches but not the dye black. Please tell us if it is not the black what is it that is clogged or defective?

Thanks for sharing your knowledge so that I can gain some understanding and learn.

If you look at my posts, I never once did suggest to him whether if his dye bk nozzle check was not clog/not having issue and vice versa. Nor did I suggest that his PGI-5BK & CMY was not clog/having issue and vice versa. Up till now, I did not make any form of suggestion as to which color (PGI-5BK, CLI-8 CMYK) nozzles looking suspicious or what other form of probable causes.

Why I didn't make any suggestion? Simply because to me, his nozzles check was not clear at all to make any meaningful conclusion. To me, it's still too early to suggest. Even though a few member here and you had concluded his '1st nozzles check scan shows good Pigmented black, CMY patches'. For me, all of his other nozzle checks at post #7 are not very clear to be strongly suggestive enough.

Do you actually mean to suggest that it is Y or C or M that is clogged rather, because the problem of the black patch is a scanner aliasing problem.

What had I been suggesting then? Look at post #12, I explicitly cropped out from his 1st nozzle check image to show those the swatch color (rainbow patch color, appearing in the form of 8 colorful rainbow-color-looking colums), which I commented that those swatch color (looking like a rainbow color patch) were caused by his scanner setting. If it's not scanner setting/resolution which cause his scanned dye black nozzle check to appear as very weird swatch color/rainbow color patch. What else is? Even if trying to contaminate the color in the dye black cartridge with any CMY, there will be no way that the dye black nozzle check is going to print out a 'swatch' color/rainbow patch color. Whatever is defective/clog will appear as streaky, white horizontal line, missing line, lighter color, missing color, 1/2 banding color, irregular color etc... As it's impossible to get to the dye black nozzle check to print out swatch color/rainbow patch colors.

As such, all the while, I had been suggesting that he play around with his scanner setting to get the best possible image so that the nozzle check can be clearer to minimized they appearing swatch color/rainbow patch color. Then more meaningful idea can be formed.

Which is why at post #14 & #16, after he had adjusted his scanner resolution, the dye nozzle check no longer looks like 8 column of swatch color/rainbow color patch. But appear as blocks of black color nozzle checks (even though there may or may not be is any unusual pattern since his images at #14 & #16 were too small to be seen clearly).

Do you actually mean to suggest that it is Y or C or M that is clogged rather, because the problem of the black patch is a scanner aliasing problem. Remember, the author reported having banding on black. That doesn't take a genius to guess that the black is clogged, does it? The first nozzle check scan shows good Pigmented black, CMY patches but not the dye black. Please tell us if it is not the black what is it that is clogged or defective?

As mentioned above, without a clear nozzle check pattern either from diagnoistic utility nozzle check or service test print of extended nozzle check pattern, I rather not suggest which PH nozzles (PGi-5, CMYK) or other probable causes was giving him banding on black. From post 1-16, he didn't explicity tell us exactly at the print software setting what media type option he had selected. All he replied was, it was 'standard print mode', when Molitor asked whether his manual (first image) was printed on draft mode.

Let's assume 2 scenario (irregardless of the actual type of hardcopy paper use, whether had it been plain paper or glossy photo paper etc),

Scenario 1
1)If the author selected plain paper as the media type via the printing software. Now black ink from PGI-5 nozzles would have been the one used to print the black.

Scenario 2
2) If the author selected photo setting (eg *PPP, PPPG, GPP, HRP ... etc) as the media type via the software. Now composite color of Cyan, Yellow, Magenta and dye black would have been used altogether to print black color.

You were right. Not only that I am not a genius at all, and I won't even want to guess whether his dye black is clog/defective/other problem yet until some form of visible nozzles check pattern can be produced or more information on his printing setting.

By the way, on ip4200 Y and BK have a same number of nozzles. It seems if scanner aliasing occurred on black it would have occurred on yellow too.

Very good question. How on earth did his scanner device and what scanning setting could produce only bk swatch/rainbow patch color while the dye CMY doesn't have rainbow patch color? It's still puzzle me. Nevermind, now lets see some scanned images of a no clog nozzle check printout.

First, let consider a no clog or missing ink dot nozzle check printout for example ip4200/mp500 that uses PGI-5BK & CLI-8CMYK etc.

Generally, what you see on the CLI-8 CMYK nozzle check horizontal bar are actually make up by 8 column block full of color ink dots.

Most of the time the 8 column block are really not very noticeable especially the CMY. However sometime people can see the 8 column block for dye black slightly more noticeable than CMY (as if there were slightly misalign on their dye black column such that the 8 columns each appearing up-down-up-down...). Below is an image of the dye bk nozzle checks, click to enlarge.


Now let's take a look again at the same no clog/ no missing ink dots dye black nozzle check after playing around with the scanner setting which is scanned high resolution. As it's high resolution image, the file size, width & height of the image are very large, so the dye black nozzle check image is sliced into 3 parts. The top image from Fig 1 show the full horizontal bar of a dye black nozzle check for which size has been reduced so that it can be squeezed into a single image file. This top image from Fig 1 depicted how the original high resolution image is going to be sliced. The bottom image depicted the actual sliced parts, 1a, 1b, 1c from a very large hi-resolution image. As you can see from the sliced dye black nozzle check, their is no missing ink dot.
Fig 1. Click to enlarge the image, save to computer and view if the browser adjusted the display image.


Now take a look at Fig 2 which is same no clog/no missing ink dots dye black nozzle checks above just that the scanning setting had been adjusted and scanned at low-resolution. You can clearly see that the same no clog/no missing ink dye black nozzle check now appear as 'bk swatch'/rainbow color patch.
Fig 2


(those with IP4500 can also pick up their nozzle check and try to observe closely at the dye black nozzle check)
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updated on Nov 2 : due to the dead link on one of the picture. Corrected the url of the hyperlink.

 

[brendo]

Im telling you, all you need to do is dip the cartridge outlet port in a dish of warm water for about 30 seconds, put back into printer and print a page of black. If that doesn't fix it do it again and it will work the second time. I used to have the EXACT same problem. Its simply a feed issue on the pickup of the PGI-5BK. when I had this problem on my ip4200 (back in the day) the nozzle check would come out fine, but when you print areas of black, you would get banding.

Just try it, nothing can be damaged from it and it will work trust me.

also, no one say "never trust anyone that says "trust me" " haha

I think you guys are reading wayyyyy too much into this, when it's just a simple problem.

IMO

EDIT: oh and also, when i had this problem on my ip4200, it would print fine when HQ was selected, but the mass banding appeared on standard Q