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Dip-Coating Film Thickness (Guide)
Dip Coating Thickness Calculator
Estimation based on Landau–Levich–Derjaguin (LLD) model. Enter values to auto-calculate.
Dip Coating Thickness Calculator
Please enter the part
Viscosity η
cP
Withdrawal speed U
mm/s
Surface tension γ
mN/m
Density ρ
kg/m³
Volume solids
%
Correction factor k
—
Substrate
—
Primary solvent system
—
Substrate factor f_sub
—
Solvent factor f_sol
—
Capillary number (Ca)
—
Wet film hwet
µm
Dry film hdry
nm/µm
Dry film Unit
(nm / µm)
Ca = ηU/γ; LLD valid roughly for Ca<0.1. / hwet (µm) = 0.94·√(γ/(ρg))·Ca2/3. / hdry = hwet×Vol%×k×fsub×fsol; unit auto-switch.
■ Explanation of Input and Output Items (English)
| Item | Description |
|---|---|
| Viscosity η (cP) | Flow resistance; temperature-dependent. Higher η → thicker wet film. |
| Withdrawal speed U (mm/s) | Lifting speed; faster → thicker wet film. |
| Surface tension γ (mN/m) | Surface contraction; higher γ → stronger adhesion, thicker film. |
| Density ρ (kg/m³) | Mass density; affects capillary length ℓc. |
| Volume solids (%) | Solids fraction after drying; scales h_dry directly. |
| Correction factor k | Process correction; theoretical 1, adjust ~0.8–1.0 to match data. |
| Substrate (selection) | Glass/Resin/Metal/Ceramic; reflects wetting. |
| Substrate factor f_sub | Auto-computed per substrate; hydrophilic surfaces approach 1. |
| Primary solvent system | Select Alcohols/MEK/Fluorinated/Aqueous; included in correction. |
| Solvent factor f_sol | Auto-computed; tune values in the hidden Lookup sheet. |
| Capillary number (Ca) | Ca=ηU/γ; LLD valid roughly for Ca<0.1. |
| Wet film h_wet (µm) | h_wet = 0.94·√(γ/(ρg))·Ca^(2/3). |
| Dry film h_dry (nm/µm) | h_dry = h_wet×Vol%×k×f_sub×f_sol; unit auto-switch. |
■ Disclaimer (EN)
<Important Notice – Reference Values Only>
- The film thickness calculated by this tool is based on the dip-coating theory (LLD model) and general physical parameters.
- All values generated by this calculator are theoretical reference values.
- Actual film thickness may vary due to equipment precision, environmental conditions, substrate pretreatment, and formulation factors.
- These results are not guaranteed values. Please confirm final film thickness through actual coating trials and measurements.