Digital BW, The Print

----- Original Message -----
From: "jimhayes361" <jimhayes@...>
To: <DigitalBlackandWhiteThePrint@yahoogroups.com>
Sent: Sunday, March 17, 2002 9:38 PM
Subject: Re: [Digital BW] New MIS FS Neutral Inks are GREAT!


> --- In DigitalBlackandWhiteThePrint@y..., "Martin Wesley"
> <mwesley250@e...> wrote:
> > Mike, Nij, Lawrence, All,
> >

(snip)

>
> No that is not what I would test for first. I would track the obvious
> variable.
>
> Time. Or rather how much ink is used over time. If you want to take a
> survey, simply ask three questions:
> 1) inkset used
> 2) positive or negative rating (say 0 to 10). Nij is quite right about
>  a neutral scale; one must be able to both praise or condemn or the
> data will be meaningless.
> 3) How much ink is used per month say. Or word it like this: how many
> days a month is your printer used? Or, how many hours per day? Or you
> can phrase it thus: How many 8x 10 equivilents / month? The best would
> be to get BOTH a mean value of ink usage/ printer on time /month AND a
> standard deviation of that usage.
>
> Standard deviation is a measure of variability of the data, if you
> don't know. For example if I turn my printer on every day and print
> exactly one 8 x 10 only, and do a repeat exactly the same every day
> for a month, my S.D. is nil. If however, I print out forty 8x10 one
> day, three the next day, and then none for three weeks, I will have a
> high S.D.

Jim,

That would be a good way to set up a poll. In the end, the more I thought
about it, the people who should be running it are over at Conetech. If they
really wanted to see how wide spread and serious the problem(s) is/are they
could simply survey their customers or use the Poll section of the Piezo
list. The Yahoo Poll function is rather limited though. At this point I am
more aggravated by the apparent lack of concern or any steps to correct
things, but I really don't know. It is possible that they have made changes
and that over the whole customer base the situation is better than it was. I
haven't heard anything but I really haven't been listening either.

>
> I propose an hypothesis that with Piezo ink, and probably with others
> to some extent, low means and high S.D. will correlate with more
> negative ratings. This condition is indictive of inks sitting around
> unused for awhile, and seeing sporadic usage. I would venture that
> folks printing every day mass quantities of piezo prints would have
> less problems. Therefore with sporadic use, the ink is inclined to
> break down, clog the printhead more, perhaps sludge up a CIS, and
> other things we have all come to know and love.<g>

I fall into the sporadic user catigory. Printing somewhat infrequently and
then printing until it smokes. I would have to say the the rate of clogs in
terms of frequency and severity was many times worse with the Piezo on my
1200 than with MIS inks on my 1280. Of course this may be printer related.

Martin
>
> In the past, I limited myself to honing a positive definition of DSS
> (density shift syndrome) only. It is not my place I felt to pass
> judgement on how the problem should be tested, resolved, or even to
> pass judgement on any inkset. Since I gather from this thread that no
> answer has been forthcoming, I now merely suggest an hypothesis and an
> approach that might prove interesting.
> Jim H.
>
>
(snip)