Equipment Performance Flashcards

In flexographic printing, the anilox roller's primary function is to:

Answer: Meter a controlled, consistent volume of ink to the plate

The anilox roller delivers a precise, metered volume of ink to the flexographic plate through its engraved cell structure.

Which of the following best describes the purpose of a blanket in offset lithography?

Answer: To transfer the inked image from plate to substrate

The offset blanket receives the inked image from the plate and transfers (offsets) it to the substrate, providing a resilient printing surface.

What does 'TIR' (Total Indicator Reading) measure in press cylinder evaluation?

Answer: The runout or eccentricity of a rotating cylinder

TIR measures the total runout (eccentricity) of a cylinder as it rotates, indicating how true and round the cylinder is.

In sheetfed offset printing, 'set-off' occurs when:

Answer: Wet ink from one sheet transfers to the back of the next sheet in the delivery pile

Set-off is the unwanted transfer of wet ink from the face of a freshly printed sheet to the back of the sheet stacked on top of it.

Press operators use a 'star target' on a press sheet primarily to evaluate:

Answer: Slur and doubling in the printing impression

A star target is a diagnostic target that reveals slurring or doubling by showing distortion or blurring at its center point.

The main reason UV inks are used in specialty printing applications is that they:

Answer: Cure instantly when exposed to UV light, eliminating drying time

UV inks polymerize and cure instantly upon exposure to UV radiation, dramatically reducing drying time and enabling immediate post-press processing.

When calibrating a digital inkjet press, 'linearization' refers to:

Answer: Adjusting ink output so tonal values print proportionally to input data

Linearization ensures that the tonal response of the inkjet press is proportional, so a 50% input value produces a 50% output density.