"
$,',. 2<<::<<:=0<;
Thermal printing technology also enables printing on pre-printed paper. However, a few things must be observed to avoid
damaging the sensitive printhead. The use of pre-printed paper increases the before mentioned effect. Since the
preprinted ink is located between the printhead and the heat-sensitive layer, it must be able to withstand high thermal and
mechanical loads. Unfortunately, even the best printing ink is not as resilient as a good thermal paper. This can result in
larger build ups during the printing process than with standard thermal paper. Therefore, the following rules must be
observed:
Rules for printing on pre-printed paper:
• The color coverage in the printing areas should be kept to a minimum, max. 25% ink application, preferably zero.
• Only using specied thermal printing inks with a minimum temperature tolerance of 230°C, recommended 250°C.
• Do not print on sensitive, metallic or luminescent paints. Hologram foil should be placed outside of the printing
area.
• Never use opaque white in the printing area.
• The heat output (blackening) must not be increased.
• When printing on pre-printed paper, the density parameter 18,6 must not exceed value of 25. It is recommended
to reduce the parameter to a value of 22.
("(" ) " *+,-+,-+..% !"",'$/.,%.%%.
0"(! "(12 3 *+,-+,-+..'' .+4$%$.
5".6 )7 .8..$
-$..%"7 "3971," 7"31"1)),
" ,71," "! "75,
To Next Page
Loading...