What does the term 'ratio' refer to when mixing automotive paint?

Ratio refers to the parts of each component, not the volume.

Why is it important to follow the manufacturer's recommendations for mix ratios?

Following the manufacturer's recommendations ensures the paint cures properly and achieves the desired finish and durability.

Find the correct ratio on the cup, then pour each component up to the corresponding line for that ratio, reading from left to right.

Pour the clear coat into the mixing cup up to the '2' line for the 2:1 ratio, then add the catalyst up to the '1' line for the same ratio.

The number represents the relative amount or 'part' of the component to be added, not a specific volume measurement.

I can accurately measure and mix automotive paint using ratios on a mixing cup to match a specified color code.

1
When mixing catalyzed clear coat, it is important to follow the manufacturer's recommended mix ratio to ensure proper results.
2
Mixing cups use ratios to measure parts, not volume, and should be read from left to right to accurately mix clear coat and catalyst.
3
For Euroclear with a two-to-one mix ratio, you can add an extra half part or whole part of reducer for better flow in hot or humid conditions.