retroreflective = reflective = engineer grade (regular reflective)
it can be prismatic, or non-prismatic; however prismatic cannot be solvent printed or plotter cut
high intensity prismatic, diamond grade, conspicuity tape, etc reflect more light, but are very hard to cut and do not like to apply to contoured surfaces
I like 3M's reflective materials personally.
This is not true!
This is straight from the ASTM website:
Retroreflective sheeting shall he classified as follows:
--A medium-intensity retroreflective sheeting referred to as 'engineering grade" and
typically enclosed lens glass-bead sheeting. Typical applications for this material are
permanent highway signing, construction zone devices, and delineators.
-- A medium-high-intensity retroreflective sheeting sometimes referred to as "super
engineer grade" and typically enclosed lens glass-bead sheeting. Typical applications
for this material are permanent highway signing, construction zone devices, and
delineators.
-- A high-intensity retroreflective sheeting, that is typically encapsulated glass-bead
retroreflective material. Typical applications for this material are permanent highway
signing, construction zone devices, and delineators,
-- A high-intensity retroreflective sheeting. This sheeting is typically an unmetallized
microprismatic retroreflective element material. Typical applications for this material
are permanent highway signing, construction zone devices, and delineators.
-- A super-high-intensity retroreflective sheeting. This sheeting is typically a metallized
microprismatic retroreflective element material. This sheeting is typically used for
delineators.
-- An elastomerie high-intensity retroreflective sheeting without adhesive. This sheeting
is typically a vinyl microprismatic retroreflective material. This sheeting is typically
used for orange temporary roll-up warning signs, traffic cone collars, and post bands.
-- A super-high-intensity retroreflective sheeting having highest retroreflectivity characteristics
at long and medium road distances. This sheeting is typically an unmetallized
microprismatic retroreflective element material. Typical applications for this material
are permanent highway signing, construction zone devices, and delineators.
-- Asuper-high-intensity retroreflective sheeting having highest retroreflectivity characteristics
at long and medium road distances. This sheeting is typically an unmetallized
microprismatic retroreflective element material. Typical applications for this material
are permanent highway signing, construction zone devices. and delineators.
-- A very-high-intensity retroreflective sheeting having highest retroreflectivity characteristics
at short road distances. This sheeting is typically an unmetallized
microprismatic retroreflective element material. Typical applications for this material
are permanent highway signing, construction zone devices, and delineators.
