What Is Make-Up Fluid and Why Is It Used in CIJ Printing?
Make-up fluid, also known as diluent or solvent, is a key consumable in Continuous Inkjet (CIJ) printing systems. It works together with ink to maintain optimal viscosity, conductivity, and print consistency. Without make-up fluid, the printer cannot compensate for solvent evaporation or maintain print quality over time.
What Is Make-Up Fluid?
Make-up fluid is a specially formulated solution—often based on alcohols, ketones, or other solvents—designed to restore the balance of ink properties that naturally change during printing operations. It does not contain pigments or dyes but is chemically matched to the ink it supports.
Why CIJ Printers Need Make-Up Fluid
1. Compensates for Solvent Evaporation
CIJ printers operate with a continuous ink stream, and ink is constantly exposed to air. Solvent components in the ink evaporate over time, increasing viscosity. Make-up fluid dilutes the ink back to its target viscosity range.
2. Maintains Proper Conductivity
As solvent evaporates, the concentration of conductive elements increases. Make-up fluid helps restore correct electrical properties, ensuring accurate drop charging and deflection.
3. Supports Jetting Stability
Correct fluid balance ensures the ink jets smoothly from the nozzle, forming consistent, clean droplets. Without make-up fluid, the ink may misfire, resulting in poor character formation or missing codes.
4. Protects Internal Components
Properly diluted ink minimizes stress on pumps, valves, and filters. It also reduces the likelihood of clogging and buildup inside the ink circuit.
When and How Make-Up Fluid Is Added
- Most CIJ printers automatically add make-up fluid when sensors detect high viscosity or conductivity.
- Make-up is stored in a separate tank and dosed precisely as needed by the control system.
- During startup, flushing, or ink refill, additional make-up may be required manually.
How to Manage Make-Up Fluid Effectively
- Use only make-up fluid specified for your ink formulation and printer model.
- Store sealed and upright at room temperature to prevent contamination or evaporation.
- Do not mix brands or use expired fluid—it may destabilize the ink.
- Monitor usage levels and keep backup stock for uninterrupted production.
FAQs
- Can I run a CIJ printer without make-up fluid? No. The system will eventually halt or trigger a viscosity fault due to ink thickening.
- Is make-up fluid flammable? Often yes—especially if based on alcohol or ketone solvents. Handle with care and store according to safety guidelines.
Conclusion
Make-up fluid is not optional in CIJ printing—it’s essential to preserve ink quality, protect system components, and ensure consistent performance. Always use the correct type and monitor your system’s fluid balance for smooth, efficient operation. Need help selecting or sourcing make-up fluid for your CIJ printer? Contact Cheef Inkjet at sales@cheef.cn today!
