Classification of solvent-based inks
1. According to the chemical properties of solvents,
we divide them into multiple categories, including ketones, ethers, esters, alcohols (monohydric alcohols – aliphatic, alicyclic and glycols), and hydrocarbons Compounds (aliphatic, aromatic, cycloalkanes). Within these categories, we can further distinguish between polar solvents, non-polar solvents, active solvents, inert solvents and diluents.
Polar solvents: This type of solvent has a high dielectric constant, such as alcohols and ketones. Their molecules contain hydroxyl and carbonyl groups, so they have polar characteristics;
Non-polar solvents: Compared with polar solvents, these solvents have lower dielectric constants, such as various hydrocarbons, which are usually non-polar;
Reactive solvents: These solvents can dissolve or disperse nitrocellulose and therefore have specific chemical activity;
Inert solvents: These solvents cannot dissolve nitrocellulose, but they cooperate with active solvents to perform their functions under specific circumstances.
2. According to solvent type
Water-based solvent-based ink: uses water as the main solvent, has the advantages of environmental protection and easy cleaning, and is widely used in food packaging, children’s products and other fields.
Oil-based solvent-based ink: uses organic solvent as the main solvent, has the characteristics of fast drying and bright colors, and is often used for printing high-end products.
.3. According to the drying method
Self-drying ink: dries naturally at room temperature, suitable for some simple prints;
Baking ink: requires high-temperature baking to achieve drying and solidification, and is suitable for products with higher printing requirements, such as automobiles, electrical appliances, etc.
4. According to use
Printing ink: mainly used for printing various paper, plastic, metal and other materials;
Coating ink: mainly used for coating and decorating various surfaces;
Printing ink: widely used in advertising, decoration and other fields.
