Digital BW, The Print

Hi John

Well 2.1 would be very nice - but currently available pigment inks will not
produce that sort of number... at least not Epson MK or MIS Eboni.  Agree on
your chemistry comment.  I guess the bottom line with OBAs is that if you
can get a paper with better dMax and a good enough white without them then
avoid those with.  Which of Somerset's papers have you worked with?

Steve

PS It would be really good to get a little more chemist input on this forum.
You will find the range of issues discussed covers the mundane to the truly
complex.  I hope you pop into other threads such as those to do with
bronzing and differential reflectance.


> From: John Edmunds <charleysfabrics@...>
> Reply-To: <DigitalBlackandWhiteThePrint@yahoogroups.com>
> Date: Mon, 28 Feb 2005 18:17:16 +0000 (GMT)
> To: <DigitalBlackandWhiteThePrint@yahoogroups.com>
> Subject: Re: [Digital BW] Somerst Velvet Enhanced
> 
> 
> Dear Steve,
>                  Yes we do supply St. C's with formulation, BUT ! But not for
> the Somerset V.E  but for another paper of theirs. I have actually seen
> Greatag do a Dmax mesurement on Somerset at the PMA last year in Vegas and it
> ran out at 2.1 which I dont thinks is too bad, but that is of course a matter
> of opinion. What I was trying to point out is that diferent chemistry's can
> produce widely different results so it is a sensible proposition to get a
> combiation where the chemistry matches so as to obtain the overal results that
> you wish to achive.
>            The problem with OBA's is that it is, as much a problem of reaction
> with the ink bases, as it is with the loss of the paper whiteness. With regard
> to the "Blue Wool Test" in this particular case  I was refering to exactly the
> fact that these tests were done on just the paper unprinted, it was not an ink
> on paper test.