Printing Ink Starting Point Formulation
Printing ink formulation requires careful consideration of various factors, including the printing method, substrate, desired color, and print quality. There isn’t a one-size-fits-all starting point formulation for printing ink, as it depends on the specific requirements of the printing process. However, it can provide a basic outline of the components commonly found in different types of printing inks:
- Pigments or Dyes: The colorants used in printing ink can be either pigments or dyes. Pigments are solid particles that provide opacity and color, while dyes are soluble substances that impart color. The choice of pigments or dyes will depend on the printing method and the desired color gamut.
- Binders: Binders are the main components that hold the pigments or dyes together and adhere them to the substrate. For example, in offset printing ink, the binder is typically a combination of vegetable oils and resins.
- Solvents or Carriers: Solvents are used to dissolve the ink components, especially in liquid inks. In some cases, water can act as a carrier, as seen in water-based inks. In other cases, organic solvents are used in solvent-based inks.
- Additives: Various additives may be included in the ink formulation to enhance specific properties, such as viscosity modifiers, drying agents, anti-setoff agents (for offset printing), and UV stabilizers.
- Extenders: In some cases, extenders or fillers are added to increase the volume of the ink and reduce costs.
- Cross-linkers or Curing Agents: For certain ink formulations, such as those used in UV-curing printing processes, cross-linkers or curing agents may be added to facilitate rapid curing.
Printing Ink Product making guide
It’s essential to consider the printing method when formulating ink. Different printing methods, such as offset, flexography, gravure, and screen printing, have specific ink requirements, such as viscosity, drying time, and adhesion.
Since ink formulation can be complex and requires a good understanding of the materials and processes involved, ink manufacturers often have their own proprietary formulations. Additionally, the formulation may need to be adjusted based on factors like climate, humidity, and the specific printing press and substrate being used.
For beginners or those starting from scratch, it’s advisable to work with established ink manufacturers or ink suppliers who can provide guidance and support in developing the right ink formulation for the intended application.