Flexographic

Blocking:

Possible Causes:

■ Ink is drying too slow

Possible Causes:

■ Use faster drying solvents

■ Decrease the printing speed

■ Increase air flow and temperature of blower.

■ Rewind pressure is too high

■ Decrease the rewind pressure

■ Over plasticized inks

■ Contact ink supplier.

■ Add anti-blocking compound.

■ Film is treated on both sides

■ Use one side treated film; or

■ Use anti-blocking compound.

Dot Bridging:

Possible Causes:

■ High plate impression

Possible Causes:

■ Check and reduce plate impression.

■ Excessive ink is transferred to the plate

■ Reduce anilox volume; and/or

■ Check doctor blade.

Adhesion:

Possible Causes:

■ Poor treatment of substrate

Possible Causes:

■ Treat substrate to appropriate treatment level

■ Improper ink for the substrate

■ Contact ink supplier and request for the right ink for the substrate.

Halo around print:

Possible Causes:

■ Excessive impression pressure

Possible Causes:

■ Adjust to “kiss” impression

Ink Smearing:

Possible Causes:

● Previous ink is not fully dried

Possible Causes:

● Adjust the previous ink by:

– Reduce viscosity

– Use faster drying solvent

– Increase blower volume and     temperature.

Screening:

Possible Causes:

■ Ink is fast drying and drying up in the anilox roll

Possible Causes:

■ Use a slower drying solvent

■ Not enough ink going into the anilox cells

■ Reduce press speed; or

Reduce ink viscosity to allow faster entry of ink into the anilox cells.

EMPIINK

Zarqa City – Jordan
P.O. Box: 392, Zarqa
13110-Jordan

Mob: +962 79 5008439
Mob: +962 79 0159649
Fax: +962 5 3650927
Email: info@maroon-eland-381622.hostingersite.com
cm@maroon-eland-381622.hostingersite.com