What are the precautions for using thermal paper?
1. Choose suitable thermal paper: Choose high-temperature resistant paper according to your needs to prevent handwriting fading.
2. Storage environment: dry, ventilated, dust-free, moisture-proof, hot, and sun proof, solvent and acid-base resistant.
3. Printing parameters: Set correctly and do not change them arbitrarily.
4. Precautions for use: Scratch resistant, minimal contact, frequent hand washing, pollution prevention, and child contact prevention.
5. Storage time: Avoid long-term storage, usually 1-2 years.
In summary, it is important to choose, use, and store thermal paper correctly, pay attention to hygiene, and ensure effectiveness and safety.
Why are there thermal paper with grid and white backgrounds
Thermal paper, as a type of processing paper, is manufactured by coating a layer of high-quality base paper; Thermal sensitive coating; (Thermal sensitive color changing layer). Applying adhesive on the back and attaching a backing paper is called thermal paper adhesive
Release paper, commonly known as“ Bottom paper”, The base paper has a separating effect on the adhesive, so it is used as an attachment for the surface paper to ensure that the surface paper can be easily peeled off from the base paper. Commonly used are glassine paper or white thick base, kraft paper, polyester (PET), etc
Below, we will introduce the differences between Grassin base paper and white thick base paper:
Grassin base paper, abbreviated as grid base, can be divided into white grid, blue grid, and yellow grid. The three are of different colors. Thermal paper usually uses white and blue grids more frequently. This backing paper is designed specifically for high-speed roll printing die-cutting and automatic labeling, with excellent die-cutting performance, good thickness, and transparency
White thick base paper has excellent flatness and is suitable for flat sheet applications. It has good strength when die cut on flat or circular pressing equipment
Overall, each has its own advantages and characteristics. How to choose the appropriate base paper? Choose according to your labeling method, whether it is roll or cut
Why do thermal paper stickers fade?
The coating of thermal paper adhesive labels contains specific thermal sensitive components, such as no color dyes (such as crystal violet lactone in the triphenylalkylbenzene phthalein system, fluoranthene management system, etc.) and color developing agents (such as para hydroxybenzoic acid and its esters, salicylic acid, etc.).
When these components are heated, they undergo chemical reactions and produce colors.
However, this color reaction is reversible, meaning that colored products will decompose to varying degrees on their own, causing the color of the handwriting to gradually fade.
