the best screen printing performance and productivity is greatly
dependent on the selection of the correct Pleiger Plei-Tech®
squeegee for the application and proper squeegee maintenance.
When printing, monitor production time and rotate squeegees
frequently. (The necessary rotation frequency is dependent
on the ink / solvent system involved in the application) By
doing so, you will achieve a more uniform print quality and
increase the life of your squeegees. A squeegee should always
be wiped clean and dry following removal from the press and
stored in a dry environment at room temperature. The blade
should be allowed to recover from the ink and solvent attack
and rest for a period of 24 hours. It can then be placed back
into production, or if necessary re-sharpened and placed back
Squeegees should always be stored flat in a dry (50% Relative
Humidity) environment at room temperature. (approximately
60-70 degrees F) Storage at temperatures below 60 degrees
F may show an increase in durometer. This increase has no
influence on the physical properties or the performance of
the polyurethane. Under these storage conditions, the shelf
life of the squeegee is approximately one year. Older squeegees
often show increased printing performance.
darken in color when exposed to UV and fluorescent light at
a slow rate. This change in color does not effect the physical
properties or the ink / solvent resistance of the polyurethane.
Our Standard Colors are: 55A, Green / 60A, Orange / 70A, Yellow
/ 75A, Green / 80A, Blue / 85A, Red / 90A, Natural.
15 (Vulkollan®) will
darken in color while stored. A change in color may be seen
in as little as 24 hours when subjected to UV and fluorescent
light. This color change does not effect the physical properties
or ink / solvent resistance of the polyurethane. Plei-Tech®
15 is Amber which will darken with age.
grinding re-sharpening methods are
able to achieve an acceptable re-sharpened edge for some printing
applications. The squeegee should always be advanced perpendicular
to the grinding belt or wheel in a very smooth and slow motion
using very little pressure. Higher quality polyurethanes will
be more resistive to this type of re-sharpening, therefore
less material should be attempted to be removed per pass and
less pressure should be applied.
durometer squeegees are easier to re-sharpen than softer durometer
is a registered trademark of Pleiger Plastics Company
Vulkollan® is a registered trademark of Bayer AG