We specialize in Pad Printing Machines,Printing machine,Printing inks,Pad printing supplies,Screen Printing,Glass decoration,Pads Plates Cliches inks for pad printing,Print Solutions,Print Services,Laser engraving,RFID Tags.We are committed to providing printing solutions & printing machines for various customers. Pad printing,Printing Machine,Printing inks,Pad printing supplies,Glass decoration,Pads Plates Cliches inks for pad printing,Print Solutions,Print Services,Laser engraving,RFID Tags

Pad printing Components Used in process

 
PADS
 
Round Pads
 
 
INKS
 
Inks Inks
 
 
SCREEN PRINTING
 
 
 
 
FAQ'S
 

PAD PRINTING

 
Pad does not take on ink film
PROBLEM AREA
POSSIBLE CAUSE
TROUBLE SHOOTING
     
Inks
Viscosity is too low.
Dilute Ink
 
Dried in
Clean the plate with thinner
 
Wrong thinner
Use a slower thinner resp. one that corresponds to the ink.
     
Printing Plate
Etching depth is too low.
Try a new plate with more
 
Wrong type of screen
etching depth
 
Surface (of plastic plates) is.
mechanically damaged
Try a new plate with a different screen
 

Try a new plate
 
 
Pad
Pad too flat
Use a more pointed shape
 
Rough surface
pad
 
Surface too repellent.
Use of a new pad
 
clean several times
 
Others    
     
     
Pad releases the ink film improperly
 
PROBLEM AREA
POSSIBLE CAUSE
TROUBLE SHOOTING
     
Ink
Dried on the pad.
Use a slower thinner
 
Too wet on the pad.
Use a faster thinner
 
unable to stick
 
Printing Plate
Wrong type of screen.
Try a new plate with a different screen
 
Etching depth is too low.
Try a new plate with more etching depth
 
Pad
Wrong shape.
Use a more pointed pad
 
Rough surface
Use a new pad
 
Material
Dirty surface (grease, oil, separating agents, hand sweat)
Pre-cleaning with alcohol; if necessary wearing gloves when inserting
 
Others
Printing sequence is too slow.
Keeping regular cycle times
 
Room temperature is too high
The room temperature is best at 18°-20° C if not use temperature control device short movie:
www.microprint.ch/xx
 
No proper flow of the ink film
PROBLEM AREA
POSSIBLE CAUSE
TROUBLE SHOOTING
     
Ink
Viscosity is too low.
Reduce amount of thinner
 
Viscosity is too high.
Dilute
 
Insufficient mixing of ink and additives
The ink has to be mixed thoroughly before being poured into the ink cup
 
Printing plate
Wrong etching depth.
Check depth, if necessary try a new plate
 
Wrong type of screen.
Test a new plate with a different screen
 
Pad
Rough surface.
Use a new pad
 
Wrong shape.
Use a different shape
 
Material
Dirty surface
Pre-clean with alcohol
 
Others
x
x
 
Solid areas are not completely printed
 
PROBLEM AREA
POSSIBLE CAUSE
TROUBLE SHOOTING
     
Ink
Viscosity is too high.
Reduce amount of thinner
 
Wrong type of ink.
Use pad printing inks
 
Transparent color shade.
use opaque shades
 
Clichee
Etching depth too low.
Try new plate with more etching depth
 
No inclination of the printing image
inclination of 5° - 15°
 
Wrong type of screen.
Test new plate with a different screen
 
Pad
Wrong shape.
Use harder pointed shape
 
Too soft.
Use harder pad
 
Rough surface.
Use new pad
 
Material
Structure of the surface is too rough
Use harder and more pointed pad shape
 
Dirty surface.
Pre-cleaning e.g. with alcohol
 
Others
Digging of the doctor blade
Use thicker doctor blade or a screen or of incliinations
 
Only single print
Double prints or bottom printings with an opaque shade (white)
 
Insufficient Opacity
 
PROBLEM AREA
POSSIBLE CAUSE
TROUBLE SHOOTING
     
Ink
Viscosity is too low.
Reduce amount of thinner
 
Transparent color shade.
Use opaque shades
 
Wrong type of ink.
Use pad printing inks
 
Low ink transfer.
Defect may be caused by pad or die plate
 
Cliche
Etching depth is too low.
Try new plate with bigger etching depth
 
Solid areas without screen.
Use a screen
 
Solid areas without inclination
inclination of 5° - 15°
 
Wrong type of die plate.
Use type that is suitable for screen
 
Wrong type of screen
Test new plate with a different screen
 
Pad
Too flat.
Use more poiinted shape
 
Rough.
Use another pad
 
Too soft.
Use harder pad
 
Material
Dirty surface.
Pre-clean with alcohol
 
Dark substrate.
Double print
 
Structure of the surface is too
Use harder and more pointed
 
rough
pad
 
Others
Digging of the doctor blade
Use harder or thicker doctor blade
 
Inclination of 5° - 15°
 
Small inclusions of air are visible
 
PROBLEM AREA
POSSIBLE CAUSE
TROUBLE SHOOTING
     
Ink
Viscosity is too thick.
Dilute
 
Cliche
Bad etching.
Check plate with a magnifying lens, if necessary try new plate
 
Pad
Surface is damaged.
Use new pad
 
Wrong shape.
Use more pointed shape
 
Too soft
Use harder pad
 
Material
Electrostatic charging.
Mount ionization unit
 
Soiled by particles of dust.
Pre-cleaning if necessary with blast of air
 
Others
Defect film.
Check film
 
Dust while film is being copied
Try new plate
 
Solied surroundings raising of dust
Pad may transfer particles of dust from the product into the ink, inclosions of air are pretended
 
 
Printings contours are not sharp
 
PROBLEM AREA
POSSIBLE CAUSE
TROUBLE SHOOTING
     
Ink
Viscosity is too thick.
Dilute
 
Viscosity is too thin.
Reduction of the amount of thinner
 
Too slow.
Use of a faster drying thinner
 
Cliche
Bad etching.
Check with magnifying lens, if necessary try new plate
 
Etching depth is too big.
Try new plate with lower etching depth
 
Wrong type of plate.
Use suitable type of plate
 
Wrong type of screen
Test new plate with a different screen
 
Pad
Too soft.
Use harder pad
 
Wrong shape.
Use different shape
 
Material
Dirty surface.
Pre-cleaning with alcohol
 
Draft within the product.
Switch over to other material if possible
 
Printing near edges.
Fixtures must support the product near the edges
 
Very uneven structure.
Use harder and pointed pad
 
Others
Work piece fixtures are not stable enough
Try new fixtures
 
High cycle times in combination with a large volume of the pad.
Decrease speed if necessary delay in front position before releasing the film to avoid vibrations of the pad during printing onto the product
 
 
Printing image is blurred
 
PROBLEM AREA
POSSIBLE CAUSE
TROUBLE SHOOTING
 
Ink
Viscosity is too thin.
Reduce amount of thinner
 
Use faster thinner
 
Too slow.
 
Cliche
Wrong eching depth.
Check depth, if necessary try new plate
 
Wrong type of screen.
Check new plate with a different screen
 
Pad
Too soft.
Use harder pad
 
Too small volume.
Use larger pad
 
Prints over edges.
Adjust pad stroke
 
Unequal pressure above cliche and product
Adjust pad stroke
 
Material
Very uneven surface.
Use pad mounting or special shapes
 
No / insufficient pre-cleaning.
Pre-clean surface
 
Drafts within the product.
Switch to other materials if possible
 
Others
Work piece fixtures are.
Fasten fixtures
 
improperly attached
 
Work piece fixtures are not.
Try new fixtures
 
stable enough
 
Cliche not properly doctored
see 8.36
     
     
Fine lines bleed into each other
 
PROBLEM AREA
POSSIBLE CAUSE
TROUBLE SHOOTING
 
Ink
Viscosity too thin.
Reduce amount of thinner
 
Too slow; inks smear.
Use faster thinner
 
Cliche
Etching depth too big.
Try new plate with lower etching depth
 
No stepped etching within fine motives
Only possible for hardened or band steel cliches
 
Wrong type of plate.
Use different type of cliche
 
Pad
Rough surface.
Use new pad
 
Wrong shape.
Use steeper shape
 
Material
 
 
Others
Pad stroke is adjusted too deep
Causes too strong deformations correct
 
 
Half-tone dots are visible
 
PROBLEM AREA
POSSIBLE CAUSE
TROUBLE SHOOTING
 
Ink
Viscosity too thin.
Thick ink in combination with fast thinner results in visible half-tone dots
 
Too slow; inks smear.
Thin ink in combination with slow thinner results in visible half-tone dots
 
Cliche
Etching depth is too big.
Try new cliche with lower depth
 
Wrong type of screen.
Depending on the desired result, use finer screen for invisible dots, coarser screen for visible dots
 
Pad
Rough surface.
Use new pad
 
Wrong shape.
Depending on the desired result, use more pointed shape to achieve visible dots use more flatshapes to achieve invisible half-tone dots
 
Material
Very rough structure of surface
In this case the structure of the surface and not the half-tone dots are visible
 
Others
Film for copying is of poor quality
Check dot-lines if necessary try new film
 
 
Splatters at the edges
 
PROBLEM AREA
POSSIBLE CAUSE
TROUBLE SHOOTING
 
Ink
Viscosity is too thick.
Dilute
 
Ink buildup at the pad.
Use faster thinner
 
Cliche
Etching depth is too big.
Try new plate with lower etching depth
 
Wrong type of screen.
Try new plate with a finer type of screen
 
Pad
Wrong shape.
Use more pointed shape pad
 
Rough surface
Use new pad
 
Material
Electrostatic charging of surface
Mount ionization unit
 
Others
Humidity is too low.
Increasing humidity to 60-80%
 
Cycle time is too high.
Reduce printing speed
 
Printing sequence is irregular
Maintain regular printing sequences
 
 
Colour does not correspond with template
 
PROBLEM AREA
POSSIBLE CAUSE
TROUBLE SHOOTING
 
Ink
Viscosity is too thin.
Reduction amount of thinner
 
Wrong type of ink.
Use pad printing inks
 
Shade cannot be mixed
Use opaque shades
 
Cliche
Wrong etching depth.
Check depth, if necessary try new plate
 
Wrong type of screen
Try new plate with a different screen
 
Pad
Wrong shape.
Use hard, pointed shape
 
Rough surface.
Use new pad
 
Material
Dark substrate
Try to obtain a thicker ink film by printing twice or more
 
Others
Only single print
Test double or triple printings
 
 
 
Distortion of the printed image
 
PROBLEM AREA
POSSIBLE CAUSE
TROUBLE SHOOTING
 
cliche
Incorrect motive was etched.
Compare original and printed image by holding the film over the print if necessary correct and make new plate
 
Pad
Wrong shape.
Use different shape
 
Too soft or too hard.
Use different hardness
 
Pressure is too strong.
Shorten pad stroke
 
Unequal pressure over plate and product
Correct pad stroke
 
Wrong point of touchdown
Use different point of touchdown of the pad
 
 
too little volume.
Use bigger pad
 
Material
Very soft or elastic.
Cool before printing causes more rigidity
 
Others
Unsuitable work piece fixtures
Modify fixtures to achieve support on all positions of the product
     
     
Index of multi-color printings does not fit
 
PROBLEM AREA
POSSIBLE CAUSE
TROUBLE SHOOTING
 
Cliche
Index of different printing images does not fit
Try new plate with new film that is correctly indexed
 
 
Pad
Pads are not mounted centrally
Re-adjust
 
Unequal shapes.
Use equal shapes
 
Different hardness.
Use pads of the same grade of hardness
 
Uneven pad stroke over plate and product
Correct pad stroke
 
Material
Drafts within the product.
Switch to other materials if possible
 
Others
Work piece fixtures are not stable enough
Check production of new fixtures if necessary
 
Conveyor, shuttle or turntable move inaccurately
Check indexing
 
Fixtures are insufficiently attached
Fasten screws of fixtures
 
x
x
 
Ink film does not adhere to the product
 
PROBLEM AREA
POSSIBLE CAUSE
TROUBLE SHOOTING
 
Ink
Wrong type of ink.
Use suitable ink type according to the technical data sheet
 
Wrong / no hardener.
Add appropriate hardener to two-component-inks
 
Wrong/inexact proportion of mixing
Exact weighing of ink and hardener is indispensable
 
Material
Dirty surface.
Pre-cleaning with alcohol
 
Others
No/insufficient pre-treatment.
Check pre-treatment repeat if necessary
 
Required hardening period was not respected
Observe required hardening period
 
No/insufficient after-treatment
Check after - treatment repeat if necessary
 
 
Cliche isn't properly "doctored"
 
PROBLEM AREA
POSSIBLE CAUSE
TROUBLE SHOOTING
 
Ink
Ink too thick.
Dilute ink
 
Ink too thin.
Mix new ink
 
No pad printing ink
Use pad printing ink
 
Cliche
Uneven.
Use even cliche
 
Worn.
Use new cliche
 
Warped.
Check mounting
 
Dirt under thin cliches.
Remove cliche, clean and remount
 
Cup
Worn.
Use new cup
 
Doctor blade edgedamaged.
Use new cup
 
Not enough ink.
Add ink
 
Racle
Worn.
Use new blade
 
Blade damaged.
Use new blade
 
not parallel to cliche.
Readjust blade
 
too little blade pressure.
Increase blade pressure
 
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We specialize in Pad Printing Machines,Printing machine,Printing inks,Pad printing supplies,Screen Printing,Glass decoration,Pads Plates Cliches inks for pad printing,Print Solutions,Print Services,Laser engraving,RFID Tags.We are committed to providing printing solutions & printing machines for various customers. Pad printing,Printing Machine,Printing inks,Pad printing supplies,Glass decoration,Pads Plates Cliches inks for pad printing,Print Solutions,Print Services,Laser engraving,RFID Tags
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