Inkjet receptive coating materials
A cationic coating fixes the ink dye where it lands. Prints come out with denser, more vivid colour, sharper edges and better water resistance. We supply the cationic binder and the inorganic sol from one plant.
Why the coating has to be cationic
Most inkjet dyes are anionic, which means negatively charged. A receptive layer with a positive charge pulls the dye out of the ink vehicle and holds it at the surface instead of letting it soak into the base paper or spread sideways. That gives:
- higher colour density and more vivid colours;
- sharper dots and less bleeding between colours;
- better water resistance and image durability.
An inorganic sol in the coating forms a fine porous structure that absorbs the ink vehicle quickly and adds gloss.
GH2019 cationic silicone-acrylic emulsion
- Composition
- Cationic acrylate copolymer emulsion
- Appearance
- Bluish-white liquid
- Solids
- 30 ± 1 %
- pH
- 4.0–4.5
- MFFT
- > 0 °C
- Properties
- Strong adhesion and good gloss. Self-crosslinks as water evaporates. Antistatic and mould-resistant.
- Uses
- Photo and inkjet paper coatings. Also sealers and topcoats on porous mineral substrates.
- Packaging
- 125 kg plastic drums, or to order
- Storage
- 5–35 °C, ventilated, out of direct sunlight; shelf life 6 months
Starting formulation: photo paper coating
| Component | Parts by weight |
|---|---|
| GH2019 | 7 |
| Water | 3 |
| Defoamer | 0.01 |
| Levelling agent | 0.03 |
Which inorganic sol to pair with it
| Sol | Compatible with GH2019? | Role |
|---|---|---|
| GHAL alumina sol | Yes, positively charged | Porous ink-receptive layer, gloss, dye fixing |
| Acidic colloidal silica | No, its particles are negatively charged | Gloss, surface strength |
| Alkaline colloidal silica (CH83-1) | No | Use only in non-cationic layers |
Starting formulations are guidance only and are not suitable for every application. Trial the product in your own system before production use.
Frequently asked questions
Why does a cationic coating make inkjet prints more vivid?
Can I add ordinary colloidal silica to a cationic inkjet coating?
What substrates can GH2019 coat?
Need the full TDS or a trial sample?
Tell us your application and target spec. Our technical team replies within one working day.