Impressions - September 2013 - (Page 66)
tS
Screen Printing Technique
4. Few people consider the effects
that the screen’s tension can have on the
opacity of the ink film being printed onto
the garment. The truth is that the screen’s
tension has a direct effect on the opacity
and color intensity of any ink. As lowertension screens require greater squeegee
pressure, the resulting ink film will be depressed further into the fabric, as opposed
to being deposited onto the fabric. As for
color intensity, consider printing an allpurpose color onto a white underbase. A
lower-tension screen will deposit a thicker
ink fi lm, resulting in the appearance of
a darker color. A thinner ink film being
printed through a higher-tension screen
will deposit a more even and accurate ink
film and true color.
5. Thinner underbase ink films enable faster flashing. The aforementioned
thinner ink fi lm being deposited onto the
surface of the fabric will require less heat
in order to be properly flashed, as opposed
to a thicker ink film that has been depressed into the fabric. In such a situation,
the fabric also insulates the ink fi lm. The
result is an increase in required flash times
66
Impressions | September 2013
in order to properly gel the underbase or
color. The rule is simple: Thinner ink films
require less heat to flash and cure. The
benefi t here is not only the softer hand,
but also an increase in productivity.
6. Since the higher-tension screens
allow for the production of thinner and
consistent stencil thicknesses, they also
will reclaim in less time and decrease the
generation of a ghost image in the screen.
Let’s simplify it with an analogy: Using
a pressure washer to remove ink from a
metal post is easy, as the post is rigid and
the ink has nowhere to hide. The force of
the pressure washer makes ink removal
easy. Attempting the same effect on a loose
piece of fabric simply will not work, as
the fabric is blown out of the way due to
the force of the washer and the ink remains
on the fabric. The same applies to tight and
loose screens. The tighter the screen, the
cleaner and faster it will reclaim.
Of all the variables that require control in the textile screen printing process,
none carry the weight that the screen
does when attempting to control quality.
The quality of your press-ready screen
is directly proportional to the quality of
your finished product.
Rick Davis is southeastern regional sales
manager for Triangle Ink Co. He is a 35year veteran of the textile screen printing and
apparel manufacturing industries. His background includes plant design, management,
troubleshooting, apparel manufacturing and
consulting. He also is a member of the Academy of Screen Printing Technology. For more
information or to comment on this article,
email Rick at rdavis@triangleink.com.
Suggested
Reading
Like this article? Read these
other screen printing articles at
impressionsmag.com:
• “Controlling Variables, Part 1”
• “How to Print Logos Using
High-Density Ink”
• “Screen Printing on Fashion
French Terry”
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Table of Contents for the Digital Edition of Impressions - September 2013
Impressions - September 2013
Contents
First Impressions
From the Show Director
FYI
Product Gallery
ISS Conferences
Outdoor Outfitting
Beat the Heat
Today’s Textile Ink Options
Shop Spotlight
Shop Spotlight
Embroidery Technique
Embroidery Production
Tech Tips Embroidery
Screen Printing Production
Screen Printing Graphics & Design
Screen Printing Technique
Online Directory
Tech Tips Screen Printing
Digital Decorating
Classifieds
Ad Index
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