MANUFACTURING – POWDER COATING, FINIHING & PAINTING CALCULATOR
Wet Film To Dry Film
A precise tool.
What is the Wet Film To Dry Film & How does it work?
In powder coating and liquid paint processes, the material is first applied as a wet film. This wet film contains both the binder (resin) and the pigments, plus a proportion of volatile solvents or carrier gases that will evaporate or cure away, leaving a thinner, solid layer on the part.
The relationship between the wet film thickness (WFT) and the final dry film thickness (DFT) is governed by the volume solids (VS) of the coating. Volume solids represent the fraction of the coating that remains after all volatiles have been removed. By multiplying the wet thickness by the solids fraction, we obtain the thickness of the cured coating.
This conversion is essential for quality control, as specifications are usually given in dry film thickness. Knowing the required dry thickness allows the operator to set the appropriate wet film application parameters.
DFT = WFT times frac{VS}{100}
DFT = Dry Film Thickness (µm)
Parameters
Result
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Frequently Asked Questions
What is the relationship between wet film thickness and dry film thickness?
The dry film thickness (DFT) is calculated by dividing the wet film thickness (WFT) by the volume solids (VS).
How do I calculate the dry film thickness if I know the wet film thickness and volume solids?
Multiply the wet film thickness by the volume solids to get the dry film thickness.
What is volume solids in coating processes?
Volume solids represent the non-volatile, solid portion of a coating that remains after evaporation or curing.
Can I use this calculator for both powder coating and liquid paint?
Yes, the relationship between wet and dry film thickness applies to both powder coating and liquid paint processes.
What factors can affect the volume solids in a coating?
Factors such as resin type, pigment load, and solvent content can affect the volume solids of a coating.
How important is accurate measurement of wet film thickness?
Accurate measurement of wet film thickness is crucial to ensure proper application and achieve the desired dry film thickness.
What should I do if my calculated dry film thickness is lower than expected?
Check the volume solids content; it may be lower than anticipated, affecting the final dry film thickness.
Results are for informational purposes only and do not constitute professional advice.