Water-Based Flexo Ink
For paper, board, labels, cartons, and selected packaging applications.
Technical support
Technical Support & Troubleshooting
Practical support for water-based ink and varnish matching, substrate evaluation, viscosity and pH communication, and press-trial troubleshooting. The site describes assistance, not guaranteed correction.
Troubleshooting
Diagnose the press symptom before choosing ink or varnish
Each issue should be discussed with real production details. The right adjustment may involve ink, varnish, substrate, drying, press control, or handling.
| Problem | Possible direction | What we need from you | Trial note |
|---|---|---|---|
| Slow drying | Review dryer capacity, press speed, substrate absorbency, ink film and dilution balance. | Substrate, process, speed, dryer condition, ink dilution and current drying time. | Assist analysis only; final drying window must be confirmed on the real press. |
| Foaming | Check circulation, pump condition, viscosity, pH, defoamer approach and press-side handling. | Circulation setup, foam timing, viscosity/pH readings, dilution and photos if available. | Foam control may involve both ink adjustment and press-side handling. |
| Poor adhesion | Review substrate type, surface treatment, ink selection, drying and downstream processing. | Substrate sample, treatment details, print structure, drying setup and adhesion test method. | Film and treated surfaces require case-by-case trial confirmation. |
| Weak rub resistance | Evaluate ink film, drying, varnish option, coating weight and handling requirement. | Printed sample, rub test method, finish target, substrate and downstream handling condition. | Varnish may help, but final performance depends on the full print structure. |
| Blocking / sticking | Check residual moisture, stack temperature, drying window, varnish film and pressure. | Stacking condition, time before stacking, dryer setup, substrate and coating details. | Trial should include realistic stack temperature and handling conditions. |
Product links
Connect the issue back to the product family
Technical support is more useful when the product, process, and application are all clear.
Water-Based Gravure Ink
For converters looking for water-based alternatives and application-specific matching.
Water-Based Overprint Varnish
Gloss, matte, anti-slip, rub-resistant, and water-resistant options.
What to send
Details that make assist analysis more useful
The first WhatsApp message should be specific enough for a press-side conversation.
Troubleshooting intake path
- 01Name the problemUse one main symptom first
- 02Send the press factsSubstrate, process, speed, dryer and target
- 03Review directionInk, varnish, substrate or process adjustment may be discussed
- 04Confirm by trialNo guaranteed correction without real trial feedback
Can assist analysis of dryer capacity, press speed, substrate absorbency, ink film, and dilution balance.
Can help review circulation, pump condition, viscosity, pH, defoamer approach, and press-side handling.
Can support checks around substrate type, surface treatment, ink selection, drying, and downstream processing.
Can assist evaluation of ink film, drying, varnish option, coating weight, and handling requirement.
Can help review varnish selection, coating weight, drying consistency, substrate variation, and line conditions.
Can assist analysis of residual moisture, stack temperature, drying window, varnish film, and pressure.
FAQ
Technical support FAQ
Can JLJ Coating provide technical specifications?
Typical properties are available on request. Final parameters should be matched according to substrate, print process, press condition, and intended application.
Can compliance claims be used on the website or sales material?
Only if verified with written documents for the exact product and intended use. Do not publish regulated-use, safety, VOC, or similar compliance claims without documents.
How should a sample request be prepared?
Share substrate, printing process, press speed, drying setup, target color or finish, current issue, and packaging end use. Sending real substrate samples is recommended.
Have a press-side problem to review?
Send the substrate, press details, current issue, and target property. JLJ Coating can help analyze the matching direction and sample requirements.