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P-4002 Plate
 Positive
Presensitized Double-Sided Offset Plate
The P-4002 is a double-sided positive
Offset Plate designed to ensure quality
for medium run printing and proof press on
both sides of the plate. Easily processed with
IBF developer.
PRODUCT FEATURES:
- Medium runs
- Subtractive coating on aluminium base
- Anodized
- Good visible image after exposure
- Resolution: 1 % - 99%; 250 lines/inch
- Sensitivity spectrum: UV 300 to 400nm
- Can be processed by manual, automatic or immersion
developing processing
- Exposure energy: 0.125 watts sec/cm2
- High holding dot for the entire run
- Very high resolution
- High abrasion resistance avoiding scratching and fingerprints
- Press runs of 80,000 or more
PRODUCT APPLICATIONS:
Medium run sheet-fed offset printing
and proof press.
Not recommended for web printing.
EXPOSURE GUIDE:
Use a high intensity UV light
source. The exposure time will vary according to the
distance and wattage of the light bulb. Using an IBF
21 Plate Scale, expose the plate to a clear step 3.
Using a 2,000 watt light bulb at 31" (80cm) from the
plate, expose for about 40 seconds.
Insufficient exposure can create lack of details.
PROCESSING:
MANUAL PROCESSING:
Pour and spread IBF Positive Developer
over the pad (approximately 1 oz/sq ft) using a developing
pad, cellulose sponge or a cotton wipe pad.
Spread with slight pressure in a circular motion, distributing
the developer evenly over the plate. Squeegee the excess
from the plate and pad.
Repeat again the same developing steps in order to ensure
a perfectly clean plate.
Wash thoroughly under running water.
AUTOMATIC PROCESSING:
IBF Positive double-sided plates
can be easily processed on the various automatic processor
models available.
TRAY DEVELOPMENT:
IBF Positive double-sided plates
can be tray or tank developed by leaving them immersed
in the developer at 70ºF/21ºC for 30 seconds. Wash thoroughly
under running water.
DELETIONS:
Apply IBF Positive Corrector on
the areas to be removed on the dry plate using a brush
or a cotton swab. Wash with running water and squeegee
the excess off the plate and apply the IBF Positive
Developer.
FINISHING:
Use IBF Subtractive Finisher,
pour very little on the plate and spread over using
a damp sponge.
If the plate is to be used immediately, it will not
be necessary to apply tihe Finisher.
BAKING:
In case the IBF Positive Double-Sided
Plate needs to be baked, in order to increase the length
of the run, the following precautions should be taken:
using a dry IBF Positive Double-Sided Plate not inked
or gummed, apply IBF Baking Solution with a sponge over
the entire plate; remove the excess; bake the plate
for 4 to 5 minutes at 446ºF/230ºC; after baking, develop
the plate again.
FOUNTAIN SOLUTION:
We suggest the dampening system
to be maintained between 4,5 and 5,5 pH using IBF Fountain
Solution. The conductivity should be between 1200 -
1500 micro ohms.
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