CMYK Printing - SignFreak

ExpoPhil

Member

Status: Offline

Posts: 19

Date: Feb 22, 2006

CMYK Printing	Permalink

Hi All, I'm told (and I don't know if this is correct or not) that in certain parts of the world you can make your Seiko print in CMYK only, rather than CMYKcm. I have a lot of trouble with the Light Cyan and Light Magenta just randomly banding, and always have had trouble. I've been told various things about temperature, slant of machine, skew of material but none of that's ever made a difference at all and the people who sold and service the machine just shrug and wish we'd go away. Anybody know how to change it to print just CMYK? FYI the banding just appears randomly in prints when parts of head drop out. It happens without warning and a clean brings it back up for a bit, but nine times out of 10 will happen agian within a meter or two. If you have any solutions to the banding problems that don't involve head voltages, temerature, slope of machine I'd be very pleased to hear them. Regards Phil __________________

cs6060

Senior Member

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Posts: 172

Date: Feb 23, 2006

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First of all, yes you can print with only CMYK!!!

This is matter of rip and icc profiles.

For example I'm using ONYX. In process of making new media you select what type of colors do you use: RGB, CMYK, CMYKcm, CMYKRG...

So everything depends on your media settings...

Not on printer... printer prints what you give him to print...

You mentioned drop out of ink on some colors in the middle of print - from my experience it's air leak on old "type" of heads.

When did you buy your printer? - if it's 1 year old or maybe your supplier sold you older machine there is possibility that you have heads with "design" problem - which results with air leak.

You can see picture of new head. I rounded part which is different on new head...
So with quick look you can determine what type of heads do you use...

If your heads don't have this additional part (small tubing) you have old head which has air leak problem...

How to prevent those problems I described earlier on this forum - search for it!

Larger picture

ps. yes it is my finger on that picture... he, he, he...

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Print Long and Prosper

ExpoPhil

Member

Status: Offline

Posts: 19

Date: Feb 28, 2006

	Permalink
Nice one, thanks for all that. I seem to get better quality of help on here than from my tech support people. Thanks again. __________________

seattle

Veteran Member

Status: Offline

Posts: 76

Date: Mar 1, 2006

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I have had some serious banding issues in the past and it sounded alot like yours. I could pause and clean the heads but after a few feet it would return.

This was the problem for me.

I had the printer enclosed in a room (for fume issues) I had 2 exhaust fans about 3 feet away from the side of the printer. Well these exhaust fans work good only when there is air for them to exhaust, ie with the door open, So to keep the room vented we would leave the door partially open. What was happening was that the fans was pulling air over the top of my print and under the ink heads and they were drying out fast.

Now I always print with the door closed.

Ohh and by the way I had to find this out the hard way by myself because my Seiko guy AND my distibuter are morons.

So just make sure that there is no draft getting under the heads while they are printing.

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Topic: CMYK Printing