Insulation ink is a special type of ink used to create electrical insulation on surfaces. It is commonly used in the production of printed circuit boards (PCBs) and other electronic devices. Insulation ink is typically made from epoxy or other resin materials that are good electrical insulators. These inks can be cured using heat, ultraviolet (UV) light, or other methods.

UV offset ink is a special type of ink used in offset printing that cures (dries) when exposed to ultraviolet (UV) light. This is different from traditional offset inks which dry through evaporation.

The ink you're looking for is called thermochromic ink. It's a special type of dye that changes color based on temperature.

Printing is the process of transferring text, images, or patterns from a master form to a receiving surface. The master form can be made of a variety of materials, including wood, metal, plastic, or even paper. The receiving surface can be paper, cloth, or another material.

September 10, 2023 is my country’s 39th Teachers’ Day and the first Teachers’ Day after the successful convening of the 20th National Congress of the Communist Party of China. Recently, the Ministry of Education issued a notice to make arrangements for the celebration of Teachers' Day in 2023.