Tiny white dots in blue and black parts of the print

Oh im new
sorry for this post
i couldn't delete it

 

hello Shadi
i have same problem
did you solve this?

 

Weird...but also hard to see in any detail from the photos.
There wouldn't really be any reason that a printer would print fine everywhere else and then randomly decide not to print small dots in certain colours. Have you tried cleaning the encoder strip?
Updated all firmware etc?

 

Actually i changed my ink into no brand Chinease one ,white dot are different when i print same image, encoder strip is clean i think. do you think this is happen because of ink?

 

this picture is printed on patterned PVC wallpaper, you can see white dot in bottom of pictures

 

cheap ink can lead to cheap results
But could still be a media issue.

 

interesting, in a lot of the colours that show the white dots are made up of several colours so two or more heads have to have the fault at the same time - place. if interference or loose cables then i would have thought the dots to have one of the make up colours in it.

so probably back to media - ink combination but you say tried others, my last guess is static.
extra thought is it the same with vector or bitmap images., a corrupted bit map my do this ?

 

Dear Woolly i couldn't understand what you said,
this ink has very powerful colors and and i tested on my Epson GS6000 before, and now white dot are exist in Mutoh VJ-1324x when i change UMS ink to this one. other color doted with this ink is a little bit larger than UMS ink.
i have this white dot on every media i tested but white dot is still exist.

 

yes but i tested before in Epson and there was no problem, and about media i have this problem in all of my media just with this printer

 

you have to think how the colours are made.
to print black may have 4 colours on top of one another not just the black ink so to have a random hole all the heads have to told not to print at that spot, comes back to the media rejecting the ink at that random spot only. normally shows as fish eyes
seen it happen eg. some one sneezes in the print room every roll of media in the room could be contaminated and would look similar to this fault but a couple of feet further in to the roll being fine from there on. other examples fly spray, spray polish.etc.
still thinking static have a look with a good magnifying glass try and see whats happening.

 

oh i understand,you think this kind of ink maybe reject in some spot when ink drop to media? due your comment black is made of 4 colors and drop on media why dots are white? during this thing dots may be have some another color, not white

i don't think this problem happened because of Media, because i have 12 printer in my print house and rest of them with another ink have no problem like this, this is my first Mutoh machine that i used "no brand" ink in there and today in compare of other printer i see some noise in printing.
i use media in another printer without problem and bring this media in this printer i have problem!
before this i tested this ink in one of my Epson GS6000 and i had no problem.
even i make a profile again for this ink in this printer but problem is still exist

 

but my nozzle check is OK. all nozzles are open. did you have problem in nozzle check in your printer?

 

i have never heard anything about allergic reaction up to now, i should research about it, thank you

 

Problem solved, white dots disappeared after 1 week , i think some solvent was remained in dampers.
thank you All