How to Measure Thermal Paper Roll: A Complete Guide

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Choosing the right thermal paper roll is essential for your printer’s performance and longevity. To ensure compatibility, you must accurately measure the roll. Here’s a step-by-step guide to help you understand how to measure a thermal paper roll.

📏 Key Measurements to Know

A thermal paper roll is typically measured using three key dimensions:

1. Roll Width (W) – The width of the paper across the face of the roll.
2. Roll Diameter (D) – The total diameter of the entire paper roll, including the paper wound on the core.
3. Core Size (C) – The inner diameter of the cardboard or plastic tube (core) in the center of the roll.

A common way to describe a roll size is: Width × Diameter × Core (e.g., 80 × 60 × 12 mm)

🛠️ Step-by-Step Measurement Instructions

1. Measure the Roll Width

• Use a ruler or caliper to measure the width of the roll from edge to edge.
• Common widths: 57mm, 80mm – depending on your printer type.

2. Measure the Outer Diameter

• Place the roll on a flat surface.
• Measure from one edge of the roll across the center to the opposite edge.
• This helps estimate how much paper is on the roll.
• Common diameters: 50mm, 60mm, 80mm, etc.

3. Measure the Core Size (Inner Diameter)

• Look at the hollow tube in the center of the roll.
• Use a caliper or ruler to measure the inside diameter.
• Typical core sizes: 12mm, 17mm, 25mm.

🔍 Tip: Some printers have maximum roll diameter or core size limits. Always check your printer’s specifications.

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🧾 Why It Matters

• Compatibility: Incorrect dimensions may cause jamming or misalignment.
• Print Quality: The right roll ensures smooth feeding and high-resolution printing.
• Cost Efficiency: Choosing the optimal size helps balance usage and cost.

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📦 Summary Table

Dimension	Description	Common Sizes
Width (W)	Paper width	57mm / 80mm
Diameter (D)	Outer roll diameter	50mm–80mm
Core Size (C)	Inside diameter of roll core	12mm / 17mm