*YillumaxTM
Reflective Material High Intensity Reflective Sheeting
HG1930 incorporates a pressure sensitive adhesive and
should be applied to the sign substrate at temperature of
65° F/18° C or higher by any of the following
methods:
Mechanical squeeze roll applicator – Application to
extrusions that are edge wrapped requires sufficient
softening of the sheeting. This can be accomplished by
directing additional heat to the “next to last” edge
roller. This practice will increase productivity and
minimize cracking.
Hand
squeeze roll applicator
Application of YillumaxTM
Reflective Material High Intensity Reflective Sheeting
HG1930 Series for complete signs or backgrounds must be
done with a roll laminator, either mechanical or hand
driven.
Hand
Application
Hand application is recommended for legend and copy
only.
Hand applications will show some visual irregularities,
which are objectionable to aesthetically critical
customers. These are more noticeable on darker colors. To
obtain a close-up uniform appearance, a roll laminator
must be used. All direct applied copy and border MUST be
cut at all metal joints and squeegeed at the
joints.
Splices
YillumaxTM
Reflective Material High Intensity Reflective Sheeting
HG1930 must be butt spliced when more than one piece of
sheeting is used on one piece of substrate. The sheeting
pieces should not touch each other. This is to prevent
buckling as the sheeting expands in extreme temperature
and humidity exposure.
Double
Faced Signs
The sheeting on the bottom side of a double-faced sign
can be damaged if rolled through a squeeze roll
applicator with an unprotected steel bottom roller. The
use of a semi-soft flat sheet between the steel roller
and the applied sign face will provide protection from
damage. A material such as a rubber mat, tag board or
cardboard is recommended.
Substrates
For traffic sign use, substrates found to be most
reliable and durable are properly prepared aluminum
sheets and extrusions. Users are urged to carefully
evaluate all other substrates for adhesion and sign
durability. Other substrates that may be satisfactory for
proper application of sheeting will have the following
characteristics:
Clean
Smooth
Flat
Rigid
Dimensionally stable
Weather resistant
Non-porous
High surface energy (passes water break test)
Substrates with low surface energy may require additional
preparation such as flame treatment, mechanical abrasion
or use of adhesion promoters prior to sheeting
application. Guide sign extrusions may be edge wrapped.
Flat panels or unwrapped extrusions are to be carefully
trimmed so that sheeting from adjacent panels does no
touch on assembled signs.
YillumaxTM
Reflective Material High Intensity Reflective Sheeting
HG1930 is designed primarily for applications to flat
substrates. Any use that requires a radius of curvature
of less than five inches should also be supported by
rivets or bolts. Plastic substrates are not recommended
where cold shock performance is
required.
Imaging
YillumaxTM
Reflective Material High Intensity Reflective Sheeting
HG1930 may be processed into traffic signs by any of the
imaging methods described below. Customers should test
each application to meet their own criterions before mass
production.
Sign legends for retroreflective signs are produced by
the following methods:
Cut-out Letters and Symbols: directly applied to the sign
face.
Inkjet Printing.
Demountable Copy: This legend is made of reflective
sheeting applied to thin aluminum, which is then cut out
into the letter and legend shapes and then riveted to the
sign face. This permits the sign legend to be changed or
removed without having to replace the entire sign
panel.
Positive Silk-screen: Used for signs with legends darker
than the background, such as most regulatory and warning
signs. The legend is applied directly onto the colored
sign face with opaque ink.
Negative Silk-Screen: Used for signs with legends lighter
than the background, such as STOP signs or Interstate
shields. The process begins with a white sign face, then
a translucent ink is applied onto the sign face, with the
exception of the legend (or regions of other colors. This
produces a white legend on a colored
background.
Overlay Film: Also used for signs with legends lighter
than the background. The process begins with a white sign
face, then the overlay film in the appropriate color is
cut to remove the sections where the white is to show
through. This overlay film is then applied onto the sign
face.
Colored inks used in sign silk-screening are translucent
to allow reflectivity through the ink, whereas black ink
used for signs is opaque.
Cutting
YillumaxTM
Reflective Material High Intensity Reflective Sheeting
HG1930 may be cut into letters and shapes of at least 3
inches in height and stroke widths of at least 1/2 inch.
Smaller sizes are not recommended. Sealing cut edges of
YillumaxTM
Reflective Material High Intensity Reflective Sheeting
HG1930 is NOT required.
Plotter Cutting
Programmable knife cut (electronic cutting)
Fla bed plotters can either die cut or kiss cut and offer
the most consistent reliable performance.
Friction Fed plotter. Kiss cut only. Success has been
achieved using plotters that have 600 grams of down force
and a 60° cutting blade. Additional drive wheels may need
to be added to improve tracking. An alternative procedure
is to cut sheeting from the liner side. Blade force and
knife depth must be set to score but not cut through the
top film. Break apart individual copy or
apply premask to retain spacing.
Other Cutting Methods
YillumaxTM
Reflective Material High Intensity Reflective Sheeting
HG1930 may be hand cut or die cut one sheet at a time,
and band sawed or guillotined in stacks. Cutting
equipment such as guillotines and metal shears, which
have pressure plates on the sheeting when cutting, may
damage the optics. Padding the pressure plate and easing
it down onto the sheets being cut will significantly
reduce damage. Maximum stack height for cutting
reflective sheeting is 1 ½ inch or 50
sheets.
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