Printing Defects

PRINTING DEFECTS

Printing DefectsPrinting defects may result from Faulty or improper printing procedures.Faulty or improper preparation of fabric prior to printing. or From imperfections in the material being printed or to imperfections in the material itself.

Flipped Yarn The part that looks like scratches because the warp and weft yarns have been turned upside down. This failure of finishing is called, flipped yarn. Basically, the cause of this trouble is due to the insufficient penetration of color paste, and it often happens when the treatment after printing is carried out inappropriately.

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BlebbinessA part of the printed surface became blebby with a rough appearance like that of sharkskin. This is often caused by such factors as unsuitability of color paste viscosity and screen mesh, and uneven adhesion.

Bleeding A printed motif blurs, & as a result the outline of the design appears unclear.

When bleeding occurs, it is possible to think of the following reasons: The viscosity of color paste is too low; The concentration of dyestuff in print paste is too highThe amount of color paste printed or amount of hygroscopic agent used is too large

Staining During Steaming Stains are transferred when a poorly washed printing table is used, the printed cloth is piled up after insufficient drying or a part of the cloth touches another during steaming. In Japan, some factories carry out complete washing of finished cloth applying tensionless rope


Uneven PrintingColor tone gaps appear horizontally at the same distance from each other. Bad screen frame, a poorly installed squeegee and uneven squeegee pressure can cause such a problem

Slight Touching Some area in a motif has pale spots. This is caused by such factors as The slow replenishment of color pasteUneven squeegee pressureChoosing a squeegee with inappropriate hardnessBad squeegee relay Uneven surface of printing tableInappropriate viscosity of color paste Inappropriate use of thickener

Poorly Adjusted Screen Disfigured designs or overlapped motifs. The problem occurs when the belt-drive and point adjustments, etc are not properly done

Double Printing Designs printed are a little off. Disfigured designs, poor engraving, poor cloth adhesion etc are the causes of this problem

Pressing Paste by Frame Sometimes a frame mark appears in the printed area. This phenomenon occurs because of poor belt drive and frame installation

Pattern Bending Printed patterns are diagonal to the line pattern or sometimes curved. This is caused when the cloth is delivered diagonally or the cloth is adhered diagonally to the printing table because of inappropriately sewed end stitches.

Speck The arrow points to the dots of color stain. This is because non - dissolved dyestuff and impurities contained in color paste have fixed to the problem area

Stain by Friction Staining occurs since the motif touches something when it is not dried and is scuffed after all

Color Paste Splash Sometimes stains can be made by color paste splashes. The splashes are most likely to occur when the roller printing speed is too fast, the screen plate is lifted inappropriately or the viscosity of color paste is too low

Extra Hanging Yarns Yarn-like-stains are made by the extra hanging yarns sticking out of the cloth. This happens especially when poorly knit fabric is used

ListingThe color shade or depth of selvages are different from that of the center. This sort of color shade or depth difference occurs because of poor bleaching, the poor installation of a frame & squeegee, uneven squeegee pressure & inappropriate padding and color fixing


End Stitches Stain Stain made by sewing machine stitches, or the end stitches of under cloth. This happens when the end stitches or joint overlaps end up too large

DropsStains or unevenness due to drops. Drain (condensed water) or drops can stain like the one the arrow points to before the completion of steaming

Doctor MarkBelt-like-stain appears vertical to the direction of roller printing

Take Up Wire


Uneven Printing due to CreaseNon printed areas appear because of crease on fabric. This is caused by crease on fabric, bad end stitches, too much tension during adhesion, crease on under cloth etc

Poor Discharge or Resist Printing Poor white discharge and colored discharge have to do with poor conditions of discharge/resist printing paste, color paste, squeegee pressure, steaming

Crack of Print Paste Printed color paste cracks. The problem occurs because poor treatment is carried out after printing or the viscosity of the color paste is inappropriate

Rope Mark ModificationRope and roller leave their marks on printed cloth. It happens when the temperatures during steaming are too high, or the temperatures set for finishing are too low

Rope Mark FadingThe area that has touched rope or rollers during steaming has faded colors or stains. This problem occurs particularly when steam is condensed in rope or rollers

Clip and Pin MissTenter's clip or pin marks remain or appear too inside. Bad clips or pins, poorly conditioned guilder and unusual cloth width can lead to the problem

Unprinted Area Some area in a motif are not printed. The reason is that foreign matter has been built up in the screen mesh, or that color paste cannot adhere to the cloth because of yarn knot or foreign matter

Crack MarksUnprinted part appears when the fabric is stretched or bent. This is caused by poor penetration of color paste due to inappropriate viscosity of color paste, screen mesh and squeegee pressure

MoireMoire pattern appears on printed designs. Screen mesh, the roulettes of rollers, the line delineation pattern have to do with this phenomenon

Water MarkAn unwanted ripple effect/light mark produced on the fabric is known as a water mark. Main causes are Improper Scouring Surface pressure of one fabric on anotherContamination with water prior to tinting or dyeing on the pad mangle resulting in a reduction in the update of dye liquor


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Printing Defects