Digital BW, The Print

Carl Schofield wrote:

>Daniel,
>
>It might be the paper or method of application.  I get zero bronzing 
>with a 10% glop coat (applied as a flat curve during printing) on 
>either Kirkland Gloss, Ilford Smoorh Pearl, or Epson Premium Semimatte 
>- not semigloss.  I also get better results with the MIS inks (UT2, 
>UT7, or FSN) than with Epson UC inks.
>
>Carl
>  
>
Carl,

I'm now at the point where I can rearrange the inks on my quad 9000 
before starting curves and linearisations for QTR. The choice is 7 
positions too as I can exchange an extra black line + damper at the head 
directly. That one is filled with PK which I use less than Eboni. I 
wonder how well a gloss inkline works when it has to share the same 
capping station with the other (dark) inks. No occasional smears 
happening that way ? If anything like that occurs I rather use another 
method, printer for glop. You have the glop at the black head side as I 
understand it.

The messages mention the use of the Epson glop in the R800 as a reversed 
print that gives most glop on the paper white reducing it to black. To 
equalise the differential. That can be done in QTR right now with the 
curves I think but would another extra condition (none, gray, toner, 
glop)  make it easier ? That method can only be done properly with glop 
applied on the same machine.

A question on grey inks + separations. Right now I use Eboni in the M 
position, a MIS middle grey in the LM position, the same grey in the C 
position and a light MIS grey in the LC position. The heavy cool MIS 
toner in the Black position. Yellow position isn't used right now.. This 
arrangement works best for linearising with the CMYK channeled Wasatch 
SoftRIP that I have. LInearisng is done on M+LM,  C+LC and K and Y 
separate. Makes life simpler to fit the inks to that system. I wonder 
how I can use the same two middle greys together in QTR. I'm quite happy 
with just 3 grey inks for the whole range but an extra set of nozzles 
for the middle of the range is nice too. So is there a way that I can 
keep the two middle greys functioning in the same way as they do now 
(more or less) in QTR ? If it is not possible right now I can spare that 
position for another toner or glop.

With an extra printer for glop/varnishing it would be possible to use a 
two component resin, one component per head. I have a UV curing 
polyurethane that works quite nice for gloss paper by silkscreen 
application but can't be used on matte paper. It must be possible to 
make a 2 component one that's more fluid too. Will ask the supplier.

Staedtler has a new water borne ink range that can be applied on a range 
of uncoated media. It is called Lumocolor and has the same ink base the 
Lumocolor felt pens have. On some substrates (plastics etc) the print 
has to be heated to 80 degrees celsius to give them outdoor quality. Can 
be used on the wide formats piezos including the Epsons but needs a 
heater for the materials mentioned. A varnish like that may be 
interesting too for our Epsons, heating if necessary can be done later on.

http://www.staedtler-inkjet.com/Inkjet_Lumocolor_Jet_Tinte.Staedtler?ActiveID=41956

Ernst