GRAFMETAL BLACK electroinsulating varnish allows for protecting elements against electrical contact. The product is characterised in high mechanical and chemical strength and aesthetic look. This offer applies to 500 ml container of the product.
Resistivity: >>200 MΩ·cm. Layer working temperature: up to 90°C. Yield: up to 5 m2/500 ml container.
How to use:
1. Mix the product before use.
2. Apply the varnish to the object. One can use a paintbrush or a spatula.
3. Wait approximately 30-60 min for drying. If further layers are needed, then they should be applied after the previous ones are dry.
The preparation can be used to make PCBs using, for example, a CO2 laser:
1. Apply the varnish to the board and burn it with a CO2 laser. Clean the pattern with a cloth lightly saturated with butyl acetate or acetone. The exposed copper layer must conduct electricity well during surface resistance measurement with a meter. The cleaning stage is crucial for achieving good etching results.
2. Etching of the copper layer.
3. Rinsing and drying.
4. Removal of the varnish by immersion in acetone.
This is a dye varnish (it does not contain conductive pigments, which usually conduct electricity), so it may not give good results with a diode laser.
