Thermal paper has become ubiquitous in modern life, used in receipts, tickets, and labels. However, not all thermal paper is created equal. This article explores the key differences between waterproof thermal paper (also known as three-proof or water-resistant thermal paper) and regular thermal paper.
Composition and Durability
Regular thermal paper consists of a base layer coated with heat-sensitive chemicals that change color when exposed to heat. While effective for standard use, it is vulnerable to environmental factors such as water, oil, and UV light.
In contrast, waterproof thermal paper incorporates additional protective layers. These layers typically include water-resistant coatings and UV inhibitors, making the paper significantly more durable. This enhanced composition allows waterproof thermal paper to withstand exposure to water, oil, and sunlight without compromising the printed information.
Longevity of Printed Information
One of the most significant advantages of waterproof thermal paper is the longevity of its printed content. Regular thermal paper often fades over time, especially when exposed to heat, light, or certain chemicals. This can lead to illegible receipts or lost information within weeks or months.
Waterproof thermal paper, however, can preserve printed information for much longer periods, often several years. This makes it ideal for applications where long-term readability is crucial, such as archival documents or outdoor signage.
Environmental Resistance
While regular thermal paper quickly deteriorates when exposed to water or oil, waterproof thermal paper lives up to its name. It can resist water splashes, rain, and even brief immersion without significant damage to the printed content. This water resistance extends to other liquids as well, including oils and some solvents.
Moreover, waterproof thermal paper offers better resistance to UV light. Regular thermal paper can darken or fade when exposed to sunlight, but waterproof variants maintain their clarity for much longer periods of outdoor use.