This story is an excerpt from an article which appeared in Sign Builder Illustrated magazine in 2006.
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| Photo courtesy of Butch “SuperFrog” Anton. |
Advancements in digital
print technology and the introduction of top coated fabric have allowed
printers to expand their product offerings to include fabric banners. These
technological advancements include: the ability of the machinery to feed and process
heavier weight materials; improved compatibility of the inks with fabrics; and
higher print quality.
As print head technology
improved, digital printers could produce smaller ink droplets, which increased
the number of dots per inch, resulting in crisper images. With the introduction
of coated fabrics, inks could better saturate the fabric, so the colors are
more robust and brilliant, instead of looking faded and washed out.
improved, digital printers could produce smaller ink droplets, which increased
the number of dots per inch, resulting in crisper images. With the introduction
of coated fabrics, inks could better saturate the fabric, so the colors are
more robust and brilliant, instead of looking faded and washed out.
In the sign industry,
top-coated banner fabrics for digital printing are relatively new. In the United States, use of these materials
was initially limited. In contrast, the
market in Europe and other parts of the world had more readily embraced the use
of these materials. Some estimate that
the worldwide market for these banner fabrics easily exceeds one billion
dollars.
top-coated banner fabrics for digital printing are relatively new. In the United States, use of these materials
was initially limited. In contrast, the
market in Europe and other parts of the world had more readily embraced the use
of these materials. Some estimate that
the worldwide market for these banner fabrics easily exceeds one billion
dollars.
With digital printing you
can provide your customers with the same print results as screen printing,
without being locked into long production runs. The ability to print the
one-of-a-kind banner or short production runs, gives sign shop owners the
opportunity to provide the smaller retailer with high quality, customized
graphics at reasonably low overall prices.
can provide your customers with the same print results as screen printing,
without being locked into long production runs. The ability to print the
one-of-a-kind banner or short production runs, gives sign shop owners the
opportunity to provide the smaller retailer with high quality, customized
graphics at reasonably low overall prices.
As the popularity of ecosolvent
and solvent digital printers has grown, so has the demand for
solvent-compatible banner media has increased. To meet these growing needs,
manufacturers have introduced new banner media, which include vinyl banner
material and banner fabrics.
and solvent digital printers has grown, so has the demand for
solvent-compatible banner media has increased. To meet these growing needs,
manufacturers have introduced new banner media, which include vinyl banner
material and banner fabrics.
The screen printing and dye
sublimation processes do not require any special coating. Using high heat, dye
sublimation prints can be fused to non-top coated polyester banner
fabrics. Many uncoated vinyl banners can
also be printed with solvent and mild solvent inkjet systems, if the right
profile is used.
sublimation processes do not require any special coating. Using high heat, dye
sublimation prints can be fused to non-top coated polyester banner
fabrics. Many uncoated vinyl banners can
also be printed with solvent and mild solvent inkjet systems, if the right
profile is used.
Printer manufacturers, such
as Roland DGA Corporation (Irvine, CA), had developed custom-match material
profiles for both topcoated and non-topcoated substrates. Roland offers a wide
variety of profiled media for use with our mild-solvent and aqueous inkjet printers. The profiles which printer companies and
material manufactures have developed
take much of the guesswork out of achieving good color on those substrates. Custom
media profiles are included with Roland’s VersaWorks RIP software so customers
can take full advantage of the ability to balance excellent color with lower
saturation levels.
as Roland DGA Corporation (Irvine, CA), had developed custom-match material
profiles for both topcoated and non-topcoated substrates. Roland offers a wide
variety of profiled media for use with our mild-solvent and aqueous inkjet printers. The profiles which printer companies and
material manufactures have developed
take much of the guesswork out of achieving good color on those substrates. Custom
media profiles are included with Roland’s VersaWorks RIP software so customers
can take full advantage of the ability to balance excellent color with lower
saturation levels.
While printing on many vinyl
banners can be printed without a top coating, inkjet printing directly to
nylon, polyester or cotton banner fabric, however, requires a special
coating. As the digital market grew and
printer technology progressed, banner manufacturer’s developed top-coated
fabrics that were compatible with the inks.
Top coatings have been formulated to work with a number of digital
printers using water-based, solvent, ecosolvent and UV inkjet inks.
banners can be printed without a top coating, inkjet printing directly to
nylon, polyester or cotton banner fabric, however, requires a special
coating. As the digital market grew and
printer technology progressed, banner manufacturer’s developed top-coated
fabrics that were compatible with the inks.
Top coatings have been formulated to work with a number of digital
printers using water-based, solvent, ecosolvent and UV inkjet inks.
In selecting banner fabric,
be sure to get a copy of the material specifications and study them
carefully. Not all banner fabrics are
top coated. Inkjet inks generally will not adhere to uncoated fabrics, which
can only be decorated with screen print inks and, in the case of polyesters,
dye sublimation.
be sure to get a copy of the material specifications and study them
carefully. Not all banner fabrics are
top coated. Inkjet inks generally will not adhere to uncoated fabrics, which
can only be decorated with screen print inks and, in the case of polyesters,
dye sublimation.
The top coating on banner
fabric serves a couple of different functions. First, it bonds the ink to the
banner fabric. And second, it controls ink flow out. While it is important for the ink to
penetrate the surface of the top coating, if the fabric absorbs too much of the
ink the image could lose its intensity of color and appear washed out. It is critical for the top coating to maintain
the integrity of the dot. A very porous
surface will cause the ink to wick, which will lead to dot gain. When this
happens, the finished appearance of the printed image will look distorted. On the other hand, if the top coating
absorbs too little of the ink, the dot does not spread sufficiently and the
image will look very grainy because
there is too much space between the dots. Correct image reproduction requires a
delicate balance of how the top coating controls the ink layer on the
substrate.
fabric serves a couple of different functions. First, it bonds the ink to the
banner fabric. And second, it controls ink flow out. While it is important for the ink to
penetrate the surface of the top coating, if the fabric absorbs too much of the
ink the image could lose its intensity of color and appear washed out. It is critical for the top coating to maintain
the integrity of the dot. A very porous
surface will cause the ink to wick, which will lead to dot gain. When this
happens, the finished appearance of the printed image will look distorted. On the other hand, if the top coating
absorbs too little of the ink, the dot does not spread sufficiently and the
image will look very grainy because
there is too much space between the dots. Correct image reproduction requires a
delicate balance of how the top coating controls the ink layer on the
substrate.
The top coating can also
contribute both to the useful life of the printed image as well as the
durability of the fabric itself.
Because the ink penetrates and embeds itself into the topcoat, the printed image becomes more abrasion resistant,
which extends the longevity of the printed image. Some top coats for banner fabrics are also
designed to make the fabric more flexible and add to the strength of the
fabric, preventing fraying edges.
contribute both to the useful life of the printed image as well as the
durability of the fabric itself.
Because the ink penetrates and embeds itself into the topcoat, the printed image becomes more abrasion resistant,
which extends the longevity of the printed image. Some top coats for banner fabrics are also
designed to make the fabric more flexible and add to the strength of the
fabric, preventing fraying edges.
The range of top coated
media options has expanded to include a variety of flexible media in part
because the technology has changed. Wide format printers are more affordable
and wider. These printers are designed
specifically for printing on vinyl banners, fabrics and flexible signface material.
And with the growth in sales of UV flatbed printers, printers can easily print
on both coated and uncoated flexible substrates. In printing banner media, UV inks adhere well
to a wide range of materials, but other advantage is nearly instantaneous curing
time and excellent color saturation.
media options has expanded to include a variety of flexible media in part
because the technology has changed. Wide format printers are more affordable
and wider. These printers are designed
specifically for printing on vinyl banners, fabrics and flexible signface material.
And with the growth in sales of UV flatbed printers, printers can easily print
on both coated and uncoated flexible substrates. In printing banner media, UV inks adhere well
to a wide range of materials, but other advantage is nearly instantaneous curing
time and excellent color saturation.
One of the major causes of
print imperfections is contamination.
Banner fabric is usually packaged on plastic, which protects the fabric
from dirt and moisture. The best way to prevent contamination is to keep the
media in its original package until you are ready to use it. Keeping the rolls sealed in the plastic wrapping
will keep the top coating from absorbing moisture. Moisture in the top coating can cause a
number of problems, such as dot gain,
poorly defined and washed out images and poor ink adhesion.
print imperfections is contamination.
Banner fabric is usually packaged on plastic, which protects the fabric
from dirt and moisture. The best way to prevent contamination is to keep the
media in its original package until you are ready to use it. Keeping the rolls sealed in the plastic wrapping
will keep the top coating from absorbing moisture. Moisture in the top coating can cause a
number of problems, such as dot gain,
poorly defined and washed out images and poor ink adhesion.
Once you remove the media
from its packaging, handle it with care.
The oils of your skin can very easily contaminate the surface of a
banner, which can affect the quality of the printed image. To prevent contamination, some people
recommend wearing gloves when handling the material. Some manufacturers also recommend wiping down
the banner fabric before printing. That may
be easier said than done. Let’s face it,
most printers are not going to unroll the banner material, wipe it down, reroll
the material and then print on it. To
expect a sign maker to do that is absurd.
from its packaging, handle it with care.
The oils of your skin can very easily contaminate the surface of a
banner, which can affect the quality of the printed image. To prevent contamination, some people
recommend wearing gloves when handling the material. Some manufacturers also recommend wiping down
the banner fabric before printing. That may
be easier said than done. Let’s face it,
most printers are not going to unroll the banner material, wipe it down, reroll
the material and then print on it. To
expect a sign maker to do that is absurd.
When printing on top-coated
materials, set the ink limits between 250% and 300%. The recommendation for ink
saturation levels can vary from one material manufacturer to another. Ink
limits vary by material and ink type. Printers have discovered that there are
huge differences in ink limits depending on the ink type. Printing at
recommended ink limits can also shorten drying times.
materials, set the ink limits between 250% and 300%. The recommendation for ink
saturation levels can vary from one material manufacturer to another. Ink
limits vary by material and ink type. Printers have discovered that there are
huge differences in ink limits depending on the ink type. Printing at
recommended ink limits can also shorten drying times.
Heavy ink saturation can
compromise the waterfast characteristics of the printed image. Heavy saturation
of ink can also result in bleeding of the image if the graphic is exposed to
water. Application of an overlaminate
can protect the print, not only from water but also from dirt. Generally, if the printed image gets dirty,
you will not be able to wash the surface without damaging the print.
compromise the waterfast characteristics of the printed image. Heavy saturation
of ink can also result in bleeding of the image if the graphic is exposed to
water. Application of an overlaminate
can protect the print, not only from water but also from dirt. Generally, if the printed image gets dirty,
you will not be able to wash the surface without damaging the print.
After printing, you need to
allow the inks to dry. Generally, you
should lay printed banners flat and wait 24 hours before rolling the prints and
shipping. Drying time, in part, depends on the temperature and humidity of your
shop. The density of the ink print also
affects drying.
allow the inks to dry. Generally, you
should lay printed banners flat and wait 24 hours before rolling the prints and
shipping. Drying time, in part, depends on the temperature and humidity of your
shop. The density of the ink print also
affects drying.
As more and more sign shop
are digitally printing vinyl banners, instead of applying vinyl graphics, the
criteria for material selection has changed.
If you are shopping for banner materials which are compatible with your
printer, ask your distributor for samples, so you can do some test prints.
are digitally printing vinyl banners, instead of applying vinyl graphics, the
criteria for material selection has changed.
If you are shopping for banner materials which are compatible with your
printer, ask your distributor for samples, so you can do some test prints.
Before you select a banner
for printing, you need to test it in your shop, in your printer and with your
inks. Have your distributor provide you
with a couple of yards to test and evaluate.
One thing you want to check is how the material runs through your
machine. Some of the inks need heat to adhere.
That heat can deform the banner material. Experienced printing
professionals also recommend monitoring and controlling your heat when printing
on vinyl banners. When you turn up the
heat, the banner softens up, which can buckle the banner and cause a head
strike.
for printing, you need to test it in your shop, in your printer and with your
inks. Have your distributor provide you
with a couple of yards to test and evaluate.
One thing you want to check is how the material runs through your
machine. Some of the inks need heat to adhere.
That heat can deform the banner material. Experienced printing
professionals also recommend monitoring and controlling your heat when printing
on vinyl banners. When you turn up the
heat, the banner softens up, which can buckle the banner and cause a head
strike.
Because some inkjet top
coatings can be damaged by excessive handling, handle them with care.
Manufacturers typically recommend wearing cotton gloves and handling the
material on the edges to prevent fingerprints and other damage.
coatings can be damaged by excessive handling, handle them with care.
Manufacturers typically recommend wearing cotton gloves and handling the
material on the edges to prevent fingerprints and other damage.
Technological advances in
digital printing, such as improvements in print resolution, printer speed,
equipment cost and durability of the printed image, have spurred the interest
and use of fabrics.
digital printing, such as improvements in print resolution, printer speed,
equipment cost and durability of the printed image, have spurred the interest
and use of fabrics.
Drying times vary depending
on several factors, such as the temperature and humidity in your shop, ink
saturation, and type of ink.
on several factors, such as the temperature and humidity in your shop, ink
saturation, and type of ink.
Digital banner fabrics are
specially top coated to accept solvent, eco-solvent and UV-curable inkjet inks.
If you are buying a top coated banner fabric, make sure that the top coating is
compatible with the ink in your printer.
A top coating, designed for water based inkjet printers, may not work
with your solvent-based printer. The quickest way to learn whether a top coated
banner can be printed in your printer is to ask the manufacturer or your
distributor.
specially top coated to accept solvent, eco-solvent and UV-curable inkjet inks.
If you are buying a top coated banner fabric, make sure that the top coating is
compatible with the ink in your printer.
A top coating, designed for water based inkjet printers, may not work
with your solvent-based printer. The quickest way to learn whether a top coated
banner can be printed in your printer is to ask the manufacturer or your
distributor.
Test, Don’t Guess
Sign makers should also test
and evaluate a textile substrate before buying. The only test that really
matters is the one that you do in your shop. Only after comparing printed
samples can you make a confident buying decision. Not all fabrics are the same.
Some print better than others. In selecting a fabric, compare how fast you can
print the different products. Then,
compare the quality of the printed images.
If a fabric wicks the ink, you will lose the crispness of the printed
image.
and evaluate a textile substrate before buying. The only test that really
matters is the one that you do in your shop. Only after comparing printed
samples can you make a confident buying decision. Not all fabrics are the same.
Some print better than others. In selecting a fabric, compare how fast you can
print the different products. Then,
compare the quality of the printed images.
If a fabric wicks the ink, you will lose the crispness of the printed
image.
Testing the compatibility of
your printer with a particular banner substrate is also a great way to get your
feet wet in printing on fabrics. Many
manufacturers provide sample rolls of material for test prints. After printing the samples, display the
prints in your shop and solicit feedback from your customers. Printed samples are a great sales tool for
starting a discussion about the benefits of digitally printed fabric and introducing
customers to a medium that they may have been unaware of.
your printer with a particular banner substrate is also a great way to get your
feet wet in printing on fabrics. Many
manufacturers provide sample rolls of material for test prints. After printing the samples, display the
prints in your shop and solicit feedback from your customers. Printed samples are a great sales tool for
starting a discussion about the benefits of digitally printed fabric and introducing
customers to a medium that they may have been unaware of.
When using digital print
technologies, such as dye-sublimation, top coatings are not needed. The dye sublimation process uses high heat to
fuse a digitally printed image onto a substrate, such as a polyester banner fabric.
In dye sublimation, graphics are printed in reverse using either an inkjet or
laser printer onto a special transfer paper. The printed transfer paper is then
placed on top of a polyester fabric or film or polymer coated substrate and
then heated in a special heat press between 350°F and 400° F for about 30
seconds.
technologies, such as dye-sublimation, top coatings are not needed. The dye sublimation process uses high heat to
fuse a digitally printed image onto a substrate, such as a polyester banner fabric.
In dye sublimation, graphics are printed in reverse using either an inkjet or
laser printer onto a special transfer paper. The printed transfer paper is then
placed on top of a polyester fabric or film or polymer coated substrate and
then heated in a special heat press between 350°F and 400° F for about 30
seconds.
Because the dye becomes part
of the fabric it cannot be abraded from the surface and banners can be washed
again and again, without losing the vibrancy of its color. Dye sublimated banners are also less
expensive and lighter weight than vinyl banners, and can be stored without
wrinkling. By adding dye sublimation to
their product offerings, sign makers have the opportunity to make high end interior
banners for retailers. Printer manufacturers have developed a wide variety of
equipment and inks which will satisfy the unique requirements for dye
sublimation onto fabric.
of the fabric it cannot be abraded from the surface and banners can be washed
again and again, without losing the vibrancy of its color. Dye sublimated banners are also less
expensive and lighter weight than vinyl banners, and can be stored without
wrinkling. By adding dye sublimation to
their product offerings, sign makers have the opportunity to make high end interior
banners for retailers. Printer manufacturers have developed a wide variety of
equipment and inks which will satisfy the unique requirements for dye
sublimation onto fabric.
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About Jim Hingst: After fourteen years as Business Development Manager at RTape, Jim Hingst retired. He was involved in many facets of the company’s business, including marketing, sales, product development and technical service.
Hingst began his career 42 years ago in the graphic arts field creating and producing advertising and promotional materials for a large test equipment manufacturer. Working for offset printers, large format screen printers, vinyl film manufacturers, and application tape companies, his experience included estimating, production planning, purchasing and production art, as well as sales and marketing. In his capacity as a salesman, Hingst was recognized with numerous sales achievement awards.
Drawing on his experience in production and as graphics installation subcontractor, Hingst provided the industry with practical advice, publishing more than 150 articles for publications, such as Signs Canada, SignCraft, Signs of the Times, Screen Printing, Sign and Digital Graphics and Sign Builder Illustrated. He also posted more than 400 stories on his blog (hingstssignpost.blogspot.com). In 2007 Hingst’s book, Vinyl Sign Techniques, was published. Vinyl Sign Techniques is available at sign supply distributors and at Amazon.