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.