Konita technical application group

KTP-II Operating Instruction

Konita KTP-II is a positive working Thermal CTP Plate

currently manufactured in Wenzhou, offering long press

run, wide processing latitude and good imaging speed.· Plate imaging speed, when used with

Konita DV-T1 developer imaging speed

= 120 – 150 mJ/cm2 .

The variance in imaging speed is to

cater for different plate setters imaging

heads, and a ±20mJ/cm2 batch to

batch variation.

Compatible with Konita DV-T1, DV-T8

developer and other brand developers

such as Kodak Gold star premium,

Huaguang GP-10 etc.

KTP-II General Appearance

Category Specification

Interleaving White interleaving

Image color Blue

Image color –

baked

Dark brown

KTP-II Product Specification

Category Specification

Alloy 1050 alloy, EC Graining

Spectral sensitivity 780-850 nm

Image energy

Requires 120 to 180 mJ/cm2 to achieve a 50%

dot (mJ/cm2 varies based on platesetter manufacturer)

Resolution (platesetter

dependant)

1 to 99% @ 300lpi @ 2400 dpi, 10 μm spot

Gauge range .0055” (.14mm) ---- .015”(.38mm)

Maximum plate width 58” (1480mm)

Packaging 20, 30, 60 and 100 plate packs depending on

size and gauge,

Shelf life 18 months under recommended storage

conditions

Operating & Storage Conditions

Category Specification

Operating conditions 16°C – 26°C (61°F-78°F)

Humidity 30% – 60%

Safelight

Allowed under white light operation 2 hours

@ 1500 lux (ambient room lighting)

Transport & storage Store plates flat in their packaging, away

from excessive cold, heat, high humidity or

direct sunlight.

Proper plate storage

conditions

Temperature 61°F– 78°F (15°C –

25.5°C)

Humidity 40% – 60%

Handling Instruction

When manual handling , the plates must be carried vertically to avoid

bending or kinking.

Plates carried with any kind of bend may distort the plates and effect the

loading and punching of the plate in the platesetter .

The punching and loading of plates in any platesetter needs to be very

careful. Problems will occur in both loading and imaging of the plate if the

plates are bent or kinked. This can be seen as the plate background having

areas of undeveloped coating.

Out of focus situations can also be caused by dirt, debris or any foreign

body on the platesetter drum or on the back of a plate.

Damage to the plate edges and introducing edge wave by poor handling

of the product will incur platesetter errors in loading, registration and

imaging of the plate. In most cases this will cause the plate to be rejected by

the platesetter.

Press Performance

Category Specification

Unbaked run length

(Alcohol fountains, 8-12%

Isopropanol)

150,000 impressions, depending on

press and paper conditions

Unbaked run length

(Alcohol replacement)

20,000 – 40,000 impressions,

depending on press and paper

conditions

Baked run length

(Aim temperature 500°F

Oven )

1,000,000 impressions, depending on

press and paper conditions

Ink / water balance Can be used in all offset applications

UV ink application Requires postbaking

Processor Set-Up and Configuration

Ensure that your processor is installed and set up correctly. Incorrect

processor installation or set-up can compromise imaging quality. The

developer cover and processor lids are to be in place at all times during

operation to reduce the oxidation of the developer that could lead to shifts in

developer conductivity and activity.

Konita Thermal Plate Developer (DV-T1)

Category Specification

Color Colorless/pale yellow

Dilution Ready for use

pH >13

Conductivity (at 25°C) 88 – 95 mS

1x1 2x2 3x3 4x4

1x1 2x2 3x3 4x4

1x1 2x2 3x3 4x4

Checkerboard Patterns

Checkerboard Patterns

Checkerboard Patterns

Under Exposure

(Increase laser power)

Correct Exposure

Match the 2x2, 3x3,and 4x4 pixel

patches with the lower half of the

checkerboard pattern

Over Exposure

(Decreased laser power)

Establishing Exposure on Kodak Platesetters

Over Exposure

Correct Exposure

Under Exposure

Establishing Exposure on Agfa Xcalibur Platesetters

1x1 2x2 3x3 4x4

1x1 2x2 3x3 4x4

1x1 2x2 3x3 4x4

Checkerboard Patterns

Checkerboard Patterns

Checkerboard Patterns

Establishing Exposure on Screen and Topsetter Platesetters

Under Exposure

(Increase laser power)

Correct Exposure

Match the 2x2, 3x3,and 4x4 pixel

patches with the lower half of the

checkerboard pattern

Over Exposure

(Decreased laser power)

Competitor’s Plates

KTP-II is designed to compete with following products:

Agfa ----- Thermostar 970

Kodak ----- Achieve EM

IBF ----- Million

Ipagsa ----- Arte IP21, Rubi T-50

Huaguang ----- TP-II, TP-26, TP-P

Strong ----- STP

Xingraphics ----- FIT

and other similar plates. (any questions, please contact us)

To compete with those high-end products, such as Agfa’s

Energy Elite, Kodak’s Sword, Fuji’s LH-PA, please consider our

KTP-SR plate.

Processor Compatibility for KTP-II

Most of dipping tank processors will be suitable for KTP-II .

Below are listed some of them:

Kodak Mercury series

Kodak T series

Kodak Quartz series

G&J Interplater series

G&J Raptor Thermal

Grafmac all models

Protek all models

Tung Shung all models

Debao DB-CTP

Konita all models

Developer Compatibility for KTP-II

Best compatible :

Konita’s DV-T, DV-T1 and DV-T8

Kodak’s Gold star Premium

Compatible but probably requiring some adjustments on

temperature, dwell time, or brush pressure/speed:

Agfa’s THD-100

Huaguang’s TPD-II,TPD-III

Ipagsa’s IP-T8/T9

Not compatible :

Kodak’s K300, K400, 980, or SP200

Fuji’s LHD2-WA

Agfa’s THD-200

IMAF’s Therm-830

Xingraphics’s Arto

IBF Million HP

KTP-II Processing Conditions

Below are recommended parameters, however, depend on

processor configuration and brush pressure, the processing

conditions for KTP-II may vary on each individual case.

Category Recommended settings

Actual Developer

Temperature

23°C – 27°C

Dwell time 25– 35 seconds

replenishment 80-120 ml /m2

Anti-ox replenishment 50-100 ml /hour

Brush speed 80-120 rpm

Filter 50-150 micro cotton wound filter

Processor Maintenance

Even though some customers processing the plate up to

5,000 ~ 8,000 m2 without requiring clean the processor, we

recommend a maintenance at about 2,000 m2 along with filter

replacement.

Troubleshooting (1)

Symptom Possible root

cause

Suggestive action

Coating

debris in

non image

areas

(coating

redeposit)

Transport rollers dirty Clean all rollers.

Developer overextended

or filter blocked

Drain developer and replace with

fresh developer, or change filter

Developer re-circulation

pump failed

Fix recirculation or replace with a

high volume pump and hoses

Developer temperature

too low

Set developer temperature higher

Not enough water spray Adjust water spray

Developer brush not set

@ right speed or not

enough pressure

Check and adjust developer brush

speed and pressure

Not enough

replenishment

Adjust replenish rate

Processor speed too fast .Check and adjust processor speed

Troubleshooting (2)

Symptom Possible root

cause

Suggestive action

banding in

image areas

Laser power too low Increase exposure power

Weak Developer Check conductivity/ pH, change to

fresh developer

Laser setting incorrect Check power, focusing, reflectivity,

surface depth etc. Call trained

technician

Developer temperature

incorrect

Adjust developer temperature

Developer brush not set

@ right speed or not

enough pressure

Check and adjust developer brush

speed and pressure

Processor speed too fast .Check and adjust processor speed

Troubleshooting (3)

Symptom Possible root

cause

Suggestive action

Ghosting or

image attack

Laser power too high Reduce exposure power

Developer temperature

too hot

Set developer temperature lower

developer not compatible Change to right developer

Developer brush too

much pressure or speed

too fast

Check and adjust developer brush

speed and pressure

Too much replenish Adjust replenish rate

Processor speed too slow Check and adjust processor speed

toning at

start-up

Plate is underexposed Increase the laser power

Troubleshooting (4)

Symptom Possible root

cause

Suggestive action

Tinting or

scrumming

in the Non-

image area

Plate is underexposed Increase the laser power

Developer temperature

too low

Set developer temperature higher

Developer overextended

or filter blocked

Drain developer and replace with

fresh developer, or change filter

Developer brush not set

@ right speed or not

enough pressure

Check and adjust developer brush

speed and pressure

Developer depleted or

water contamination

Drain developer and replace with

fresh developer (check replenish

rate)

Plate batch variation Call your Konita representative

Troubleshooting (5)

Symptom Possible root

cause

Suggestive action

Roller marks

on the image

area

Roller pressure too high Check and adjust roller pressure

Developer temperature

too hot

Set developer temperature lower

developer too strong Change to right developer

voids Developer drops on the

entrance rollers

Clean the rollers

Corrosive debris in

processor tank

Clean the processor tank and

change the developer