2. Atomic seal printing oil: the printed handwriting is clear, the printing oil is uniform and bright, and the security is strong. Because the atomic seal is mixed with printing oil, it is quick and convenient to stamp, so it is often used to make official seals of organs, groups, factories and enterprises. However, it should be noted that long-term use leads to the deformation of the seal, so it is not suitable for occasions with high requirements on authenticity, such as the inspection of bank bills.
3. Ordinary inkpad ink: it is mainly used for stamping office and business contracts or documents, with various colors, including red, blue and purple, which can be selected according to different needs. Red ink is widely used in official documents, while blue-purple ink is mostly used in specific occasions, such as the toll collection office of enterprises and institutions.
4. Water-based ink: This is an environmentally friendly ink, which is non-toxic, tasteless and harmless, safe and harmless to the production and use of official seals, convenient to use and relatively cheap. However, its color is relatively light but not fresh, which is not suitable for official seals with high definition and high color requirements.
5. Alcohol ink: It is also an environmentally-friendly ink with bright colors and clear handwriting, and is often used for official document seals with high requirements on seal color.
6. Oily ink: good quality, often used to make official seals. It is composed of resin, pigment and solvent oxide, and can be used to make official seals with bright colors and clear handwriting. However, it should be noted that drying takes a long time and needs to wait for drying before use.