Aluminium Coated Glass Bead for Reflective Screen Printing( Language Option French,ZX-002)

Detailed Product Description
1. Coated glass bead
2. High reflective effect
3. Good fluidity
4. Half sphere coated with aluminum
Aluminum coated glass bead Is coated with a layer of aluminum on half sphere.
It can highly enhance the reflective effect and be widely used for road signs, traffic safety goods, and reflective
Printing ink, or screen printing, etc.

I. Technical Data
Composition
TiO2-BaO-SiO2 GLASS
Refractive Index
1.93± 0.01ND
Specific Gravity
4.1± 0.2 g/cm3
Color
Silver grey
Form:
Fine spheres Semi-coated with aluminum
Size
20-40um; 40-60um; 60-80um
Reflective Ink Instructions

Mixing Instructions:
A. Choose neutral transparent printing inks
B. Choose glass bead with small particle size like 20~40um, 30-45um, 40-60um, 60-80um
C. Add about 30~50% of glass bead, by weight, into the clear printing ink.
D. You could add more if brighter ink is required. Adding more powder thickens the solution.
E. Do not grind the glass bead
F. Use any containers and stir the mixture at high speed.
G. To avoid deposits, you should use high viscosity resins or anti-settling agents.
H. Select a printing ink that is suitable for the surface it is to be printed on. For example, use metal abrasive oil if the surface to be printed on is metal

Usage Instructions:
A. Viscosity of mixed inks should be between 3000-5000 poise.
B. Viscosity can be adjusted during the printing process with a diluting agent.
C. A base coat of grey or very light color is preferred, especial for uncoated glass bead...Applying reflective bead paint on dark colors reduces the reflective effect by as much as 50%.
D. For good retro reflective, the reflective layer should be between 30-50um.
E. If the fastness is not well, little polyurethane can be put in.
F. Ideal mesh size for silkscreen printing screens is 60-80 mesh. Smaller screen mesh size are okay as these create a thicker printed layer.
G. One kilogram of glass bead can be mixed to produce up to 2 litres of reflective ink
H. One litre of ink can cover an area of about 6 square meters.
I. After painting, roll to roll press and dry 3 minute under 150° C

Solution of getting strong retro reflective:
A. Ink must be clear and transparent, Grey. Yellow. Red will be better.
B. Firstly, print aluminum powder as foundation. Then print with the mixture of ink and glass bead. (Aluminum coated glass bead need not)
C. Make the glass bead on the paint surface as more as possible. (ND2.2 glass bead need not)