[CQ] DC700 Black printing low gloss

[ktxerox]

HI,
I am facing problem in DC700 only black color print is coming mate no gloss on print. all other colors are fine having enoguh gloss on print.

replaced new developer housing , new developer, new drum, replaced toner only 600 to 700 pritns ok but after that problem comes again. is any one has face this issue ?

kt

[azehnali]

Re: DC700 Black printing low gloss

700 prints are not as glossy as the 240 family
what toners are you using for the color?

[ktxerox]

Re: DC700 Black printing low gloss

yes but it has enough gloss before that fault and all other colors have fine gloss. i am using orignal toners of all colors but problem is coming only in black color.

700 prints are not as glossy as the 240 family
what toners are you using for the color?

[Ianizer]

Re: DC700 Black printing low gloss

Ktxerox,

I have only beginning experience with DC"P"700, but am fairly familiar, I think, with the effect you describe.

Please clarify:

Scenario 1
You output a full color image, hold at a certain angle in the light, and K only areas have a matte finish, while anything with color has a nice, satiny gloss...

Scenario 2
Working with the xerographics, you can obtain what you believe to be a better than previous image quality, but are not entirely happy with it. Your impovements quickly degrade after you leave.

Do you agree with either of these scenarios?

I'll abstain from going any futher until I read your clarification.

-I

[azehnali]

Re: DC700 Black printing low gloss

the only thing that can cause your problem is the toner
run the regcoen test pattern with the individual cmyk and rgb print and look and compare the gloss of each color
dont run the test on regular paper
run it on coated paper

[ktxerox]

Re: DC700 Black printing low gloss

IN process color there is no issue of gloss print is ok but when you print all colors sepratoly means cmyk screens then you can see big diffrence in black color without light effect totaly matt finish.

i hope you can understand now.

[azehnali]

Re: DC700 Black printing low gloss

are you sure you are using original 700 toner in the machine and not 240 or other toners??
if your problem is only black the it has to be the toner and nothing else
are you running the cmyk on the same paper and settings
run the regcon pattern and see

[ktxerox]

Re: DC700 Black printing low gloss

yes it is 100% sure toner is orignal and i swapesd toner and develoepr housing with good wroking machine.

yes i tested screens of all colors on diffrent papers also run regicon prints in process colors black is ok but only black has same issue (matt finish )

[azehnali]

Re: DC700 Black printing low gloss

so you took the black developer housing from the bad machine and put it in another machine does the problem follow??

[ktxerox]

Re: DC700 Black printing low gloss

i took the developer hosuing from a good machine and put into the bad machine and pritns comes ok but only for 6 to 700 pritns after that problem appear again. so that is confrimed it is not toner or developer problem becuase this set of toner and developer was working fine in ithe rmahicne.

[azehnali]

Re: DC700 Black printing low gloss

no that kind of confirms that the problem is the toner because the machine starts feeding new toner in the copier right away
what I would do is oput the bad developer in the good machine and see if the first print is bad

[ktxerox]

Re: DC700 Black printing low gloss

ok i'll check it today and get u back.

thanks for your time.

[azehnali]

Re: DC700 Black printing low gloss

I have seen this problem at least a dozen times and its always been the toner and will always be the toner in the future also
remember the 700 is much much less glossy than the 240 almost zero gloss

[Ianizer]

PLEASE READ SLOWLY...

IN process color there is no issue of gloss print is ok but when you print all colors sepratoly means cmyk screens then you can see big diffrence in black color without light effect totaly matt finish.

i hope you can understand now.

I do think I understand a little better now, thank you, Kt. I'd like to duplicate this on my 700, but I suspect black alone will have a lesser gloss than color, most especially in process color... (You may find that true single color has slightly lesser gloss than mixed color).

The reason?...

Gloss is a function of fusing and toner composition. That is, your image can only be as glossy as your heat roller is smooth and your toner lets it be.

When you output your image, the color areas will, of course, be glossier than K only since the color areas have three or four layers of toner applied to mix the appropriate color. The more toner, the more gloss.

Stay with me...

Some drivers and controllers (specifically, if you are using Fiery) will have a color setting available to use K toner only for K image area... Thus the partial matte areas where there is K black only. This mechanism is primarily to give a generally desired true plain black, (and to save toner).
In my Windows Fiery driver, it is found in Expert Color settings under Black Text/Graphics: please Select Rich Black. This should allow all process color to be used to form the entire image, regardless of K only content.
You may choose to turn Off Black Overprint, but it's doubtful this will help. You might try it anyway.

This will not help you with Grayscale selected prints, and returns us to the fuser. Inspect the appearance and age of the fuser and replace accordingly.

Curious... The 700 on our demo floor produces an excellent low-to-medium satiny gloss, but no, it's certainly not the shine of, say, an old Gestetner 213 silicone oil fuser copier... I will test some files at my earliest opportunity.

-I

[ktxerox]

Re: DC700 Black printing low gloss

yes i agree with you it could be toner problem but if its works fine in other mahicne then ?

and yes it has much less glossy then 240 but previous pritns of 700 has enough gloss then now and customer is comparing with that.