Common problem when vertical stamping large designs on non-porous or slightly porous surfaces; leads to incomplete stampings containing holes.
Contact corrosion
Can arise when the aluminium of the stamping foil contacts carbon-black or bronze particles in printing inks in the presence of moisture; leads to spot-shaped destruction of the metallic appearance.
Contour sharpness
Specifies how sharp the edges of a stamped foil are.
Corrosion
Oxidation process, caused by extreme moisture in the case of foils with vapor-deposited aluminium, ruining the metallic character over the entire surface.
Degassing
Incompletely dried printing inks or lacquer which, when stamped, release gaseous components when subjected to pressure and heat; leads to incomplete stampings containing holes.
Deposition
Incompletely dried printing inks or lacquer which, when stamped, release gaseous components when subjected to pressure and heat; leads to incomplete stampings containing holes.
Foil construction
Hotstamped hologram foils consist of a polyester carrier onto which has been applied various lacquer layers and an adhesive primer. During stamping a heated stamping wheel or an engraved die activates the release layer by means of pressure and heat. This bonds the lacquer package permanently to the particular substrate made of plastic, paper or thermal paper. The polyester carrier is then wound onto a take-up reel.
Nomenclature
Name/ Color / Product type e.g.:
SB Reflex/307-KL = Pattern SB Reflex, color 307 (red, see catalogue), type KL (graphics quality)
SB Carbon / AL-Lam12 = Pattern SB Carbon, color silver (aluminium), type laminating foil 12 µ
Pattern
The design of the diffractive structures for LIGHT LINE-foils are always continuous. LK offers designs from a variety of independent hologram manufacturers. More and more designs are now being produced in-house to better meet our customer requests.
Release
Measure used to assess the processability of a stamping foil. Energy required to pull off the polyester carrier by means of pressure and heat after contact has occurred.
Rewind cutting
Splitting of foil tracks during rewinding.
Shim lines
For technical reasons, diffraction foils will display edge lines every 750 mm which, depending on the pattern, will be virtually invisible to the human eye.
Stamping speed
Depending on the stamping process, measured in sheets/hour or meters/minute.
Stamping temperature
The temperature required to fully transfer a stamping foil and activate both the release layer and the adhesive layer.
