Attention to the viscosity of organic paints (HGC) in warm weather

The viscosity of water-based organic paints (e.g. HGC) is sensitive to temperature changes. This is all the more important in the summer months, when temperatures are often exceed 30 °C.

Water-based organic paints should always be stored in warehouses with a temperature of up to 25°C and if this temperature cannot be guaranteed, the paint should be measured before every application.

 

The easiest way to measure is with a Ford cup with a 4mm diameter spout.

 

Transparent paints - recommended viscosity 22s to 27s at 20°C

Cover gloss paints - 22s to 35s at 20°C

Matte paints - 28s to 50s at 20°C

We use demineralised water to adjust the viscosity. For spray application we recommend using up to 5% demineralised water.

 

Higher viscosity also results in higher mechanical resistance of the paint. The recommended thickness of the dry paint application is 20 to 30 micrometers.

 

Are you unsure about the preparation and application of colours and you would like some advice? Write to us or sign up for our How to paint glass course.