| |
 |
|
 | Typesetting
on computer
Required software : Illustrator, Xpress, Corel Draw, Freehand…
Required equipment : PC or Macintosh
Positive film printing
Required product
: tracing paper
Required equipment : 600 to 1200 dpi laser printer |
| |
 | Saisie
des différents tampons sur matériel informatique. Logiciels courants
: Illustrator, Xpress, Freehand, Coreldraw...
Matériels courant : Macintosh,
PC...
| |
| Photopolymer processing | | Engraving
of micro porous material | | | |
 | A
hard photopolymer plate is exposed to UV light through a negative film
Required
products : film, developer, fixer, hard photopolymer plate |  | The
photopolymer plate is washed-out |  | Drying
: to remove excess of water |  | Post
exposure : final hardening | | |
 | Stamps
are engraved
Required product : micro porous material |  | Stamps
are cut by laser | |
 | The
photopolymer plate is pressed into the matrix board to get a mold
Required
products : matrix board, release spray, hard photopolymer plate |
 | Premix
is poured inside the mold, vacuum is made then a felt is placed on top
Required
products : premix, felt.
|  | Degassing,
to remove air bubble from premix material. |  | Premix
is gelled inside the press.
Stamps are cut. | | |
| Micro
porous material is placed inside ink and degassed.
Material pore absorb ink.
Product : ink |  | Microporous
material is left to settle.
Ink in excess is absorbed with a paper. |
|
| Pre-inked stamp mounting | | Pre-inked
stamp mounting | | | |
 | Stamps
are cut and placed in a mount
Required products : glue, special mount. |
| |
 | Stamps
are cut and placed on mounts
Products : glue, mounts for pre inked stamps. |
| | |
| COMPARATIVE
CHART OF BOTH TECHNIQUES : ADVANTAGES / DRAWBACKS |
- Lower cost (equipment 4 times less expensive)
- Once the mold has been
made, new copies of the same stamps are inexpensive and quickly made
- Very
important relief , appreciated by customers.
| |
- Urgent stamps are quickly made (within 3 min 30 sec for a single stamp
with a 25 Watt laser + 20 min for inking time )
- No manpower required
when the laser is working
- With laser engravers, it is also possible to
engrave other materials such as wood, plexiglass, plastics...
|
- Processing time is the same for 1 or 50 stamps : 1 hour 20 min
- Manpower
is more important (several processing steps).
| |
- Engraving time is very slow : for one A4 size : 2 hours
- Depths and
reliefs are less important than with conventional technique
- The price for
additional copies of a same stamp is as much important as the price of the first
stamp.
- The stamp price is very important due to cost of the machine
|
| |
| PROCESSING
TIMES AND COSTS OF BOTH TECHNIQUES |
Processing
time for 1 A 4 size
(about 40 stamps) | | 1
hour 20 min
(+ typesetting) | | 3
hours
(+ typesetting)
(with a 25 w laser) | | Processing
time for a single stamp | | 1
hour 20 min
Processing time is not proportional to surface | | 3
or 4 minutes
+ inking (20 minutes)
Processing time depends on the stamp
surface | | Processing
time for further copies of a same stamp | | 20
minutes
(it is just necessary to clean the mold, pour premix and allow it
to gel ) | | 3
to 4 minutes
inking (20 minutes)
(all processing steps should be made
) | | Cost
for 1 stamp (not including manpower, mount, equipment cost) | | 1.20
Euros | | 1.62
Euros |
Cost for several copies to the same stamp (not including manpower, mount, equipment
cost) - First stamps
- Further stamps
| |
| |
| | | | | |
