Digital BW, The Print

I have not found a UV blocking spray that doesn't lower the dmax of matte
paper.  Some of the water-borne coatings have UV blockers and can be put on
thick, so they actually raise the dmax.  They basically turn the matte paper
into a glossy one.  I find it easier to print on glossy paper in the first
place if I want to end up with a glossy print.

Paul
www.PaulRoark.com 


> -----Original Message-----
> From: DigitalBlackandWhiteThePrint@yahoogroups.com
> [mailto:DigitalBlackandWhiteThePrint@yahoogroups.com] On Behalf Of Scott
> McLoughlin
> Sent: Saturday, August 27, 2005 3:21 PM
> To: DigitalBlackandWhiteThePrint@yahoogroups.com
> Subject: Re: [Digital BW] Photo Protectants
> 
> So there's no protectorant spray for matte papers that has UV blocking
> in it? That seems odd to me. Is there some technical reason why this
> is the case?
> 
> Scott
> 
> Paul Roark wrote:
> 
> > Steve,
> >
> > > Does anyone know the pros and cons of using protectants such as
> > PremierArt
> > > Print Shield, Krylon Preserve It!, Clear Shield and other such
> products?
> > >
> > > To what extent, if any, do they actually preserve a print?
> > > How do they change the appearance?
> > > What are you guys and gals using?
> > >
> >
> > My fade tests, consistent with Wilhelm's, show that PremierArt Print
> > Shield
> > increases the pigments' resistance to fading. In one of my tests the
> > MIS UT
> > pigment's that were sprayed faded about 10% slower, and the UC pigments
> > faded about 30% slower (bringing them almost up to the MIS standards).
> >
> > The coatings without UV blockers in them (like Lascaux) have been, at
> > best,
> > neutral in my fade testing. Between the lines, it looks like Wilhelm's
> > results may indicate that the coatings add some degree of protection by
> > slowing the rate of oxidation. This is what I'd expect in theory, but my
> > "initial" (relatively short) fade tests have not found that.
> >
> > All the coatings I've used increased glossy paper dmax and reduce matte
> > paper dmax. Lascaux reduces matte paper dmax the most and is what I use
> on
> > matte papers. Three light coats offer some protection against abrasion
> > with
> > no significant appearance alteration.
> >
> > Many, particularly older coatings yellow with age or otherwise have
> > negative
> > results. I, therefore, don't trust coatings unless they have been used
> for
> > years or have been tested by someone I trust. PremierArt Print Shield
> and
> > Lascaux (the well known Rohm & Haas B72 formula) fit into this
> > category and
> > are what I use.
> >
> > The quality of the nozzle is an important factor. Many sprays just do
> not
> > go on evenly.
> >
> > The water-borne coatings are hard to apply smoothly, tend to get dust in
> > them due to slow drying, tend to remain tacky for a very long time, and
> > alter the appearance of the print across most of the grayscale ramp. (As
> > such, they need their own profiles.) I don't use them.
> >
> > Hope this helps.
> >
> > Paul
> > www.PaulRoark.com
> >
> >
> >
> >
> >
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> printing. Users who persistently make off-topic posts may be removed from
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> YAHOO! GROUP YOU EXPRESSLY UNDERSTAND AND AGREE THAT THE "OWNER" AND
> "MODERATORS" OF DIGITAL BW, THE PRINT YAHOO GROUP SHALL NOT BE LIABLE TO
> YOU FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, CONSEQUENTIAL OR
> EXEMPLARY DAMAGES, INCLUDING BUT NOT LIMITED TO, DAMAGES FOR LOSS OF
> PROFITS, GOODWILL, USE, DATA OR OTHER INTANGIBLE LOSSES (EVEN IF THE
> "OWNER" AND "MODERATORS" OF DIGITAL BW, THE PRINT YAHOO GROUP HAVE BEEN
> ADVISED OF THE POSSIBILITY OF SUCH DAMAGES), RESULTING FROM: (i) THE USE
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