for screenprint - detailed information
| Quality |
Water-covering capacity |
Particle size distribution |
Apparent density |
Optical characteristics |
| |
(cm²/g) |
D10 (µm) |
D50 (µm) |
D90 (µm) |
(g/cm³) |
|
| Brilliant 2500 |
2800 |
16 |
42 |
78 |
0,8 |
Coarse/very brilliant |
| Fine 36 |
3500 |
10 |
28 |
58 |
0,8 |
Coarse/very brilliant |
| Fine 4000 |
4800 |
6 |
19 |
43 |
0,8 |
Fine/brilliant |
| Extra Fine 5000 |
5800 |
5 |
15 |
37 |
0,8 |
Fine/brilliant |
Indicative formulations
| Bronze: |
6-10% |
| Aluminium: |
6-10% |
| Binder: |
90-94% |
| Suggested Waterbased binders: |
Metallic clear LFW (Sun chemicals) |
How to use
1/ Add maximum 10% of water to lower viscosity. The addition of a crosslinker may be required.
2/ Mix bronze or aluminium gradually to binder using a slow rotation mixer (50 rpm).
3/ After printing, dry and cure for 3 minutes at 160° Celcius.
Note
Use a binder with a neutral PH or low acidity degree for optimal stability results.
Ammonia and derivates will attack the pigment and lower the metallic effect.
A coarse screen should be used to avoid clogging.
The metallic printing paste should be applied last of all colors.
Particle size of metallic pigments:
The D90-particle size of metallic pigments needs to be at least three times smaller than the particle size of each square of the screen mesh.
NOTE
Bronze Grades for screen printing on textile are usually applied last after all the other colors for the following reasons :
- to prevent the metallic pigment from being taken away with the next screen while the coating is not fully dry yet;
- to retain an optimal metallic effect, which will not be the case if the bronze coating is printed over with another color.