How to Measure Wet Film Thickness using Elcometer Wet Film Combs

This is how to measure wet film thickness using a wet film thickness gauge, also known as a wet film comb.
Wet film combs measure wet film thickness, and are available in a variety of materials including stainless steel, aluminium and plastic, with various measurement scales ranging from 20µm to 3000µm.
How to measure wet film thickness using a wet film comb: place a comb perpendicular to and touching the substrate. Hold the comb in position and wait a few seconds until the teeth are wet. Remove the comb from the film. The wet film thickness lies between the biggest value ‘coated’ or ‘wet’ tooth and the smallest value ‘uncoated’ or ‘dry’ tooth.
Elcometer offer a wide range of wet film combs to measure wet film thickness. For more information on Elcometer wet film combs, please contact Elcometer at [e-mail] or visit our website at www.elcometer.com
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STANDARDS:
Elcometer 112AL, 112 & 3236 Hexagonal Wet Film Combs:
ASTM D 4414-A, AS/NZS 1580.107.3, BS 3900-C5-7B, ISO 2808-1A, ISO 2808-7B, JIS K 5600-1-7, NF T30-125, US NAVY PPI 63101-000, US NAVY NSI 009-32
Elcometer 115 Wet Film Combs:
ASTM D 4414-A, AS/NZS 1580.107.3, BS 3900-C5-7B, ISO 2808-1A, ISO 2808-7B, JIS K 5600-1-7, NF T30-125, US NAVY PPI 63101-000, US NAVY NSI 009-32
Elcometer 3238 Long Edge Wet Film Combs:
ASTM D 4414-A, AS/NZS 1580.107.3, BS 3900-C5-7B, ISO 2808-1A, ISO 2808-7B, JIS K 5600-1-7, NF T30-125, US NAVY PPI 63101-000, US NAVY NSI 009-32
Elcometer 154 Plastic Wet Film Combs:
BS 3900-C5-7B, ISO 2808-1A, ISO 2808-7B, JIS K 5600-1-7, NF T30-125

[@jonrossjan]

Wow, I knew what the comb was for but the science involved is mind blowing for laymen such as myself.

[@vukbojovic7504]

The best explanation of this method on RUclips.

[@75338]

Well that's bloody brilliant.

[@jigmeoser]

Finally.

[@parveendhiman1708]

Thanks

[@AHMEDALI-rq7jg]

Thank you

[@Naton]

nice...very informative

[@gingerbeardactual1249]

Very much appreciated

[@altafnizami]

Can be used on concrete surfaces?

[@ElcometerOfficialChannel]

Thank you for your comment.
Wet film combs can be used on concrete surfaces. However, care should be taken that the roughness of the surface does not affect your measurement results. It may not be possible to get accurate, reliable measurements on extremely rough surfaces.
ASTM D4414 states: "The procedures using notched gages do not provide as accurate or sensitive measurements of wet film thickness as do the Interchemical and Pfund gages described in Test Methods D1212. Notch gages may, however, be used on nonuniform surfaces, like concrete block, that are too rough to use the Interchemical and Pfund gages."
If you have any further questions, please contact [e-mail] or visit www.elcometer.com/contact-us to find your local Elcometer distributor.

[@binduk7334]

Thank you sir..its very usefull to me..

[@jamesbadey7312]

Just found your channel do you know where I can get a Device to measure dry paint thickness on wood

[@ElcometerOfficialChannel]

Hi,
We offer a range destructive gauges for this exact application. They can be found here: www.elcometer.com/en/coatings-inspection/all-coatings-inspection/dry-film-thickness/destructive.html
If you have any other questions please contact [e-mail]

[@jamesbadey7312]

Where can I get a device to measure dry Mill thickness

[@ElcometerOfficialChannel]

Hi,
If you would like to measure dry film thickness we have a wide selection of devices available ranging from destructive to non-destructive. They can be found here: www.elcometer.com/en/coatings-inspection/all-coatings-inspection/dry-film-thickness.html
If you have any other questions please contact [e-mail]

[@sanjaysangwan3701]

Can we used for powder coating also??

[@ElcometerOfficialChannel]

Thank you for your comment.
For measuring powder coatings we recommend the Elcometer 155 Uncured Powder Film Comb: www.elcometer.com/en/coating-inspection/wet-film-powder-thickness/powder-thickness-measurement/elcometer-155-uncured-powder-film-comb.html
If you have any further questions, you can always contact [e-mail] or visit www.elcometer.com/contact-us to find your local Elcometer distributor.

[@awnishsingh6591]

How can we use this for curve area.

[@ElcometerOfficialChannel]

Thank you for your comment.
You can use the wet film comb to measure wet film thickness along the axis of a cylinder, but not across the curved surfaces.
Alternatively a wet film wheel can be used to measure wet film thickness on curved surfaces, depending on the size and curvature of the surface.
If you have any further questions please contact [e-mail] or visit www.elcometer.com/contact-us to find your local Elcometer distributor.

[@FengWei149]

Can i use this also in powdwr?

[@ElcometerOfficialChannel]

Hi,
Our wet film thickness comb cannot be used in powder. However, we do supply the Elcometer 155 Uncured Powder Film Comb for this exact application!
www.elcometer.com/en/elcometer-155-uncured-powder-film-comb.html

[@hablemosenconcreto4745]

What if i get values of 100% volume solids ?

[@ElcometerOfficialChannel]

Thank you for your comment.
If your coating is applied as a liquid and has 100% volume solids content, then the thickness value you obtain using a wet film comb will most likely be the same as the dry film thickness once the coating has cured.
However, if your coating was only 50% volume solids, your dry film thickness would half the value of your wet film thickness.
If you have any further questions please contact [e-mail] or visit www.elcometer.com/contact-us to find your local Elcometer distributor.