Whether the ink is heat off-set, lithographic, flexographic, or gravure, achieving the product specification is a challenge. Conforming to the two requirements-ink color and pigment grind- can be a time consuming operation. This is of particular importance in specialty inks where color matching is required. Aside from the ink type or composition, conformance to product specification remains the goal.

The  System
Ink could be contaminated by many sources during production. These can be of various types- fibres, solids, and semi-solids, complicating production to an even greater degree. Often, system recirculation is required to completely eliminate a contaminant. The system filter has the burden of maintaining pigment concentration and color while removing contaminants and ensuring that grind standards are met. Figure below identifies the key filtraiton location with the appropriate filtration system recommendation in Table 8.

The  Problem 
Typical ink manufacturing processes required continuous recirculation and multiple quality checks to attain the product color and grind specifications. Many times the fitler being used before the batch is complete, requiring filter change-out and additional quality checks. In addition, the batch filtration process dictates filter disposal at the end of a color specific batch, even if the cartridge life isn’t used. When process equipment is used for more than one color ink, the system must be thoroughly cleaned, filters changed, and used filters properly disposed.
These system practices result in:
Productivity reduced by recirculation and repeated quality checksManufacturing capacity reduced by poor equipment unitilization
Increased filter use and disposal costs
Increased labor costs

Application Guide for Ink
Feature-tec Filter Application	Recommended Flow Rate per 10″ Filter	Suggested Absolute Fitler Rating
FBM	3 GPM	5 – 70 mm