Multi-pass / single-pass Different technologies – Different advantages

Multi-pass inkjet The operational basics

How Multi-pass works In multi-pass or scanning systems, the print heads move over the substrate in multiple passes to form the image.

Advantages Multi-pass Lower initial cost – Quicker ROI Super-large format available Quick set-up Better at hiding the effects of nozzle drop-out Ability to control gloss levels (matte – satin – gloss) White ink available Prints on multiple substrates

Disadvantages Multi-pass Speed – limited to between 90-200 boards per hour. Reduced throughput (compared to single-pass). Increased speeds coming – Software & Head config. Gloss Level – high gloss requires post-print coating unit. Ink Durability Potential for higher Ink costs.

Single-pass inkjet The operational basics

How Single-pass works In Single-pass you have a fixed array of print heads and the substrate moves under the heads. Because the heads are stationary and can “lay down” a high volume of ink, the substrate is able to move at a higher rate of speed. This increases the throughput significantly.

Advantages Single-pass Higher Speeds – Increased throughput High Gloss levels – Even on uncoated True Litho replacement

Disadvantages Single-pass High initial investment Large solids can be a challenge Nozzle drop-out Head alignment required (currently) Potential for tonality variation between heads

Final Thought’s Before you invest…… Don’t build your justification plan around OEM stated throughput. Understand the technology – take the time to analyze the difference. Make sure you have the infrastructure in place to support the assets. Many companies will be better served by aligning themselves with a digital print provider.

Thank You Brad Albright – ColorHub