Streaks, tracking, or ink smearing due to the folding or finishing operations through mechanical contact.
|Grater roller||Install grater roller with sharper points.|
|Ink film thickness||Decrease ink film thickness by increasing pigment strength in ink.|
|Web bustle wheels||Move bustle wheels so they are in contact with non image area, if this is not possible, put Teflon tape on wheels to reduce abrasiveness.|
|Air flow through oven causing paper to move around and coming in contact with oven parts||Check to make sure web tension is set properly. Consult oven manufacturer for proper adjustment.|
|Chill roll temperature not cool enough||Reduce chill roll temperature to 72 to 75 F°. Do not go too low on temperature as condensation may occur.|
|Silicone dosage or applicator||Check to make sure silicone applicator roller is clean and functioning properly, check dosage, if low add extra silicone to reduce abrasiveness. Consult silicone supplier.|
|Web temperature not high enough to drive off ink solvents or too high and not allowing chill rollers to bring web temperature down||Adjust oven temperature, remember that paper will burn at 451 F°. Decrease press speed to allow longer contact time in oven. Increase air velocity through oven. Check web temperature before and after chill rolls. Consult oven manufacturer.|