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How
long the prints will resist to light and bleaching?
The lightfastness depends on many parameters: Intensity of light,
humidity, temperature, used media and ink.
We use heavy-duty artist canvas with a traditional chalk/acrylic coating
which is acidfree, very low sensitive against bleaching and chemicals.
We use pigmented solvent ink commonly used for outdoor advertising
which reaches deep into the canvas' surface by using high temperature.
We put an additional UV-blocking varnish especially used to protect
oilpaintings on canvas prints.
This bundle of products and treatments improves the lightfastness
to a possible maximum in digital canvas printing.
In "normal" use at home environment with normal lights and
conditions there may not occur any change in colour for 15-25 years
or even longer. Then the colours may change within a acceptable and
hardly visible range. But depending on the place the pictures hang
(no direct sunlight) there may be no change at all within a long period
of time.
We also give a guarantee of 5 years on perfect colour stability for
the use of the prints in a "museum"-environment with light-spots
and extreme conditions. The digital printing industry's standard is
12 month colour-guarantee using pigmented solvent inks on recommended
media.
That had been one of the things we'd worked on right onfrom the beginning:
To have a long range product with no concessions to durability!
What means real canvas printing?
Intended to the benefits of artist-canvas we combined pigmented and
solvent based inks with a heavy duty canvas general used for oilpainting
and we print directly with huge amounts of ink and heating up to 90°C
at the origin acrylic, glue and chalk mixed coating of the canvas.
So we reach a strong physical and chemical connection between the
inks and the canvas' surface.
Standard at the market is printing with waterbased inks on special
coated canvases: That means another transparent acrylic overspray
is added on the original coating (like the coating of the glossy photopaper
you use at your desktop printer at home) and the print inks lay down
only on and in this overspray. To match good colours only low ink
amounts are needed.The result: less connection of the ink because
of the mechanical sensitivity of the "soft" overspray and
not acceptable lightstability because of the too low ink amount.
The solvent in our inkformula and high heating "opens" the
origin canvas coating to let the ink and the transport pigment parts
deeply into the fabric's surface. That is real canvas printing.
Is there special equipment used at
BLAUSHOP®'s pressroom?
Here at our pressroom use special updated and self improved printers
which are not found anywhere else. It had been hardly possible to
match those results with the printing-technology and machines to be
found on the market. For our purpose we specially improved the technology
on our printing-equipment, collaborated with the canvas producer to
raise the quality of weaving, coating and manufacturing the murals
to have an errorfree material and stand also in cooperation with the
producer of the used inks. Knowhow and a perfect composition of materials
are the main spirit.
Now we obtain perfectly durable results with a technology of which
even the press and printer engineers said that it was hardly possible!
Also we are happy to act as a well expirienced partners of the digital
printing suppliers and had the chance to test and judge products on
their characteristics before they arelaunched to the market.
It makes us really proud to see that we are ahead and do real canvas
printings.
How durable are those prints on canvas
against scratching and other mechanical stresses?
The prints are not very sensitive against mechanical stress. Only
within the first 2 weeks you have to take great care especially of
the frameworks borders and edges not to damage the canvas' surface.
The inks take this time to harden and additional varnish completely.
At blaukauz/BLAUSHOP®'s factory the "fresh" prints are
treated in a special warm chamber to speed up the drying process.
But at a state it just needs some more time and can't be processed
faster. Normally our standard artist stuff is printed in advance.
That means we store a stock of the popular motives and deliver them
well dried.
Only custom and short range jobs make it necessary to send a not entirely
dried prints out to the customers.
Notice: There is no treat to your health even when a print is not
totally dry. We prevent any danger to your health with having the
base drying at the factory.
What kind of printing technique does
BLAUSHOP® use?
blaukauz/BLAUSHOP® uses a frequency modulated seave printing technology.
Ink drops are shot on demand with pressure by a seave wearing print
head on the media. It is alike your desktop printer at home but in
huge dimensions and several aggregates to heat and steer the process.
The main difference is that we use solvent based inks which are rather
difficult in use on canvas but much more durable than water based
inks.
What is the difference between water
based inks and the solvent based inks?
Water based inks are smooth and easy in use to match bright and brillant
colours. They stay on the surface of a media or sink into a special
coating where lights are better reflected and show more brightness.
Water based inks won't be connected chemically with the surface, it
is only an adhesive process. Therefore the surfaces are sensitive.
Solvent based inks solve the media's surface make the ink pigments
and its glues enter the surface. The solvents dry after a short
time and are ventilated off. There stays a surface physically and
chemicallyl connected with the pigments for high durability. The
printing result is more matte. It has the characteristic of airbrush
paintings.
Note: There are some new special waterbased inks on the market
which are supposed to have a higher light stability. It is true
that those inks are comparable to our solvent formula in light stability,
but the required media for this ink is sensitive against bleaching.
Be aware: If any samples of that "new" printing are shown
to you they'll be 100% printed with no white zones to hide this
bad issue.
Depending on my desktop printer: Is
the colour appearance identical to BLAUSHOP®'s?
No, as you use dye based inks (without or low pigmented) at home you
will match better pastells and transparencies than we are able to
reproduce with our technology. That is a concession to durability
and canvas used as the printing media. Also the shade of the white
of the canvas is not similar to the one of a bleached and optical
highlighted sheet of paper.
So the white (unprinted) zones will not appear in similar brightness.
As a matter of our technology a matte colour with very small reflections
will be the result.
Since the used ink colours do not mix and flow into one another like
water based inks do and the resolution is only 360dpi, the gamut (variation
of possible colours) is smaller.
How excactly does BLAUSHOP® match
my picture's/motive's colours?
We do use professional colour management and calibrate our hardware
every day.
All profiling according to our pressroom is made inhouse and densities
of the print heads are controlled each day.
For nearly 100% colour accurancy it needs a defined workaround. You
have to prepare your files properly, but depending on the different
gamuth of RGB (what you see on your computer screen/active light)
and CMYK (colours printed by different amounts of cyan, magenta, yellow
and black/reflective light) there are not all colours reproduceable
you see at your computer screen.
For best control you should create CMYK-files from beginning on and
proof them on a special proofing printer. For more details feel free
to contact us.
Will there be any changes in the print's
surface within the next years?
No, there won't be a visible change. If you wipe off the dust from
the canvas-print with a bit of water the print's surface won't change
the way it looks.
Now as we varnish all our canvas prints cleaning won't change its
appearance.
What is the advantage of canvas?
Canvas has a precious appearance, it is durable and the best choice
for stretching on a blaukauz®-framework. Prints on it look as
unique as airbrush and not like photos or illustrations on plastic.
Is there any threat to health printing
with solvent inks?
Not for the customer. Until the print is shipped all danger to your
health is eliminated. In our pressroom we perform a lot of air exhausting
and washing directly on the printing machines to protect our health.
Then the prints are stored and dried in a special warm chamber.
When you unpack the prints you may smell the parts of the resin varnish
which is added to the print to improve the lightfastness.
May there occur any disturbances in
solid colour-zones on the print?
In the canvas there are some natural differences at the surface which
may occur more visible in solid colour zones. We check the material
with special light right before printing, each print while printing
and when manufacturing to the framework and we will reprint it if
it does not correspond with our high quality standard.
In a very few cases there may occur a hardly visible banding made
from the printing head's movement or the coating process of our canvas
supplier.
Which resolution is used in BLAUSHOP®'s
pressroom?
BLAUSHOP® prints 360dpi (dot per inch).
What can I do if the print is damaged
by wrong handling?
BLAUSHOP® always aims to keep its customers satisfied:
Therefore contact us please and explain what happened to the print
and how.
Than we will decide if the blaukauz®-framework could be refreshed
with a reprint by sending the framework back to us for a small charge.
Is the print glossy or matte?
The print is matte because the canvas is matte. Even though we put
ink all over the surface it will stay matte.
What about very dark colours, like
black?
We print on textiles and canvas. We print also with double strike
technology; that means every print pass is shot twice on the media
and to increase the amount of ink to a maximum. But the surface of
canvas/textiles suck the ink, what is a real benefit for the perfect
lightfastness but a disadvantage if you want to have solid "closed"
colours. Especially dark colours can't be printed as deeply as on
coated papers.
Are there any limitations in the print's
size?
In general not. Only the media limits the size: Canvas up to 320cm/short
size, textile up to 500cm/short side. If it is no problem to you to
have seams within the print even greater formats are realizable. We
also offer connections with zippers etc.
How solid is the framework against
any change in humidity and frequently change of room temperature?
The wood used for the framework is technically dried and two or more
layers are glued together to prevent problems with straightness as
much as possible. Unfortunately blaukauz® can't guarantee 100%
straightness because wood is a natural material and may differ from
piece to piece.
Is it possible to hang such a framework
on slanting walls, too?
Yes, when you mount the framework with the alloy-clamp coming in the
package you may mount it even on slant walls up to 45°. But be
conscientious to fix the clamp properly to the wall.
What are the main features of the so
called blaukauz®-framework?
It stays straight even when the temperature or humidity changes;
easy restretching with the patented one-screw-solution;
convenience in mounting and care;
completely "hidden" behind the motive.
How does it differ from ordinary stretcher
bars?
The principle is almost the same but the high-quality of all its parts
make the patented blaukauz®-framework unique.
Are there any limits in size for blaukauz®-frameworks?
Yes, beside the normal one-piece-bars we also produce special bars
with stronger profiles which can be sticked together to reach lenghts
up to 10 Meters. We had no chance to proove bigger formats until now.
How does BLAUSHOP® help me if the
framework breaks? Does blaukauz give any guarantee on that item?
If the blaukauz®-framework brakes please contact us. If there
is no external cause for the damage send it back to us and we will
rebuilt it with no costs for you.
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