Ink Yield in Wide Format Presses

Understanding Ink Yield in Wide Format Presses

Overview

This article provides foundational insight into how ink yield is calculated in wide format printing. While formal training on press setup will cover this in greater detail, this guide supports interpretation of RIP data, inventory management, and accurate job costing.

What is Ink Yield?

Ink yield refers to how many square metres of print area can be produced per litre of ink. This is distinct from cartridge size, which is already tracked via inventory systems. Yield is based purely on volume-to-area efficiency.

Methods for Calculating Ink Yield

  1. RIP Data Analysis

    • Assess square metre output per job.

    • Divide by the litres of ink consumed per colour.

    • Offers real-world accuracy across different designs and coverage levels.

  2. Manual Test Print Method

    • Print a solid flood of one colour.

    • Record ink usage to determine yield.

    • As all inks are supplied in equal volumes, any single colour can be used.

Colour Profile and Ink Distribution


Once you know how much coverage you get per litre at 100% usage, the next step is to look at how the ink is distributed across colours in your chosen colour profile. Here's an example of a typical breakdown:

Cyan (C)
Light Cyan (LC) 
Light Magenta (LM) 
Magenta (M)
Yellow (Y)
Black (K)
8.63%
20.77%
20.42%
15.42%
25.75%
9%

Notes
These calculations will be easier to apply once RIP data and colour profiles are accessible. Proficiency in tools like Excel or pivot tables enhances accuracy.
Once base yield per litre at 100% coverage is known (e.g., 90m²/L), colour profile values help determine usage distribution across inks. Using that, we can project ink consumption more accurately based on the number of passes (e.g. print quality settings like Standard or High Quality).

Example (6-Pass Quality Setting):

  • Cyan (8.63%) → 8.63% × 6 = 51.78% → 90m² / 0.5178 ≈ 174 m²/L

  • Yellow (25.75%) → 25.75% × 6 = 154.5% → 90m² / 1.545 ≈ 58.2 m²/L

Ink usage increases with higher pass counts (e.g., 8-pass mode), reducing overall yield.

Practical Benefits

  • Enables accurate forecasting for ink orders.

  • Supports more precise per-job costings.

  • Improves control of ink-related inventory.

Idea

Establish a standardised test file for benchmarking ink usage across presses during commissioning or when testing new media types.

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