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Letter 1670
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. I believe Lord's Z-line Chemglaze is an aromatic polyurethane used mainly for interior applications. The A-line (i.e. A276) is aliphatic and had a name change from Chemglaze A-xxx to Aeroglaze. It is very good for exterior and space use. I think it meets the NASA outgassing requirements (ASTM E595 [link is to spec at TechStreet]). The white color has good reflectivity and there is a black that is a good absorber. Also, I would be interested in some more info on Martin Black. Have been unable to locate any. Paul C.
Kochendorfer |
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Hi, does anyone know of any conductive coating that can be applied on stainless steels or aluminum and provides corrosion protection. I presume that I do not talk about gold or platinum.
mahmoud abd elhamid
pennstate - state college, Pennsylvania
I am interested in spray paints for metal surfaces which have a low reflectivity throughout the visible and near / mid-IR ( from 400 nm to 12 microns ).
Does anyway know if Krylon Flat Black
[Krylon Spray Enamels 1602 ultra-flat black ] is non-reflective in the near-IR?
Could anyone recommend to me a book or source of data on IR reflectivities of various paints and coatings?
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Mark Nelson
I would like to ask the same question Mark Nelson asked. I need a paint with a very low reflectivity value to use on a mounting platform that will be used to mount atmospheric radiation sensors. Could you please tell me if Krylon ultra-flat black will work or if there is a better product. Todd
Schimelfenig
I would like to ask the same question Mark Nelson and Todd Schimelfenig asked. I need a paint which is non IR reflective for military use. |
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Re: Flat black paint w/low reflectivity in IR range +
To answer this question....
a. site for paint/material emissivity: electro-optical.com/bb_rad/emissivity/emissivity.htm
b. the best paint for Black body as IR sources is: ALEXIT Velvet coating 811-21 (was 3M Nextel) emissivity of .97, thermal conductive 30 deg.C to 150 deg. C, total emissivity -60 deg. C to 150 deg. C.
Douglas Stone
- San Diego, CA, USA
JFYI,
NEXTEL Suede and NEXTEL Velvet coatings are STILL available, not through 3M though.
The distributor for North America is Mankiewicz Coatings LLC.
They have been selling these products under the ALEXIT brand but have recently acquired the rights on the NEXTEL brand name for North America.
Stefan Guenther
- Greenville, SC , USA
I am researching many of the same issues posted here in several questions. There are two important papers you may want to consider, especially if your applications are cryogenic: (1) "The selection of infrared blacks for SIRTF" by St. Claire Dinger, SPIE, Vol. 2260, Stray Radiation in Optical Systems III (1994). (2) "Infrared black paints for room and cryogenic temperatures" by Ungar, Mangin, Lutz, Jeandel & Wyncke, SPIE, Vol 1157, IR Technology XV (1989). I spoke with Martin Marietta in FL and was told they are not interested in applying the Martin anodize process for small external projects. Have not checked Lockmart. Lord Co.'s division in Erie PA sells the Aeroglaze products, and there are other companies (do a quick web search) who will apply it for you if you'd rather not buy large quantities. My experience is that companies sell the rights to these products frequently, so it takes a bit of detective work to locate what you need.
Michelle Creech-Eakman
Caltech - Pasadena, California
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Ed. note: The smart vendors have presence at finishing.com, which is
always current, and then it takes their potential customers no
detective work at all 
I think that the best black coating is ZYNOLYTE a paint for Hi-Temp (1200ºFº) the original purpose was to paint stoves or similar, but now is used for all manufacturer of black-bodies, for NASA, Sandia Labs etc. The coefficient is 0,99 and works perfectly in IR, Distributor is Athena Brands Inc Gardnerville Nevada
E. Diez Valero
- Madrid, SPAIN
I am looking for an infrared absorbing paint (absorption peak should be in the 810 nm region) for coating of wood.
Can anyone advise ?
Carole Helfter
PhD student - Heriot-Watt University - Edinburgh, UK
The emissivity of Krylon Ultra Flat Black Paint is listed in the
web site below as 0.97 at 5 um. I have recently used a 3-5 um InSb
radiometric thermal imager to measure the emissivity. I sprayed the
paint on a copper plate and mounted it on a cold finger of a variable
temperature dewar with a calcium fluoride window. I rotated the dewar
window so as to not back reflect. I measured an emissivity of 0.89
for the setup. If we exclude the reflection from the window (~0.04 x
2), this would give an emissivity for the black paint of ~0.97 in
agreement with the web site.
http://www.infrared-thermography.com/training.htm
James R. Lindle
Research Physicist - Bowie, Maryland
This page lists 3M optical black as having an Emmisivity of
1.00... I assume since its made by 3m, it should be commercially
available from them somewhere, but I have yet to find a source. If
anyone can find a source for this paint...
www.infrared-thermography.com/training.htm
"Paint: 3M, black velvet coating 9560 series optical black"
Apparently coatings used in optics, telescopes, laser devices, etc...
are the best bet to look for which have been developed for extremely
good absorption across a wide spectrum (I assume, precise data on any
particular paint would be far preferable as to how it reacted across
a large area of the spectrum).
Mark Starr
- Augusta, Georgia
The web site below gives the reflectance spectra of a number of
commercially available paints. The emissivity is just 1 minus the
reflectance.
http://speclib.jpl.nasa.gov/scripts/lib/asp/ManmadeResp.asp
James R. Lindle
Physicist - Bowie, Maryland
Data on Martin Black and several other black surfaces are given in
this author's paper:"Review of black surfaces for space-borne
infrared systems" Review of Scientific Instruments, vol 70, no 5
p2193.
3M black hemi-directional, spectral reflectance 2-9 microns is 0.04;
9-20 microns its 0.06.
Merle J. Persky
MIT Lincoln Laboratory - Newton, Massachusetts
I am student of M tech from surface coating
technology,UICT,Matnga,Mumbai,India .I am doing project on IR
Reflective Coatings.
Can you refer me to information related IR Reflective Coatings?
Bhupesh Marathe
student - India
I have been experimenting with infrared coatings for NIR, MidIR and FarIR. In general if the temperature of the item coated is 100 deg C or less the Krylon ultra flat black gives the best most consistent coating, better than many that are specified higher than .97. It is far easier to apply than most other coatings also. Spectral would be from 1 to 16 microns but at longer wavelengths how the coating is applied makes a difference. At surface temperatures above 100 deg C it turns grayish and emissivity drops significantly.
Steven Cook
- Tucson, Arizona
October 15, 2008
Can anyone suggest a black paint which has very high absorption at
1500-1600 nm range and can use at high temperature up to 400 deg C.
any suggestion will be highly appreciated
Thanks,
Ginu Rajan
Researcher - Ireland
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August 27, 2009 Depending on the Form, fit, function and wave length of the part that has to absorb IR, the processes are various and many. Electrolysis, painting and / or growth. Over the past 15 years I have tested many so with a little more information I might be able to point you in the right direction. Keith Pieske
September 15, 2009 We are looking for a high emissivity coating (or surface treatment that would cover the 3 to 15 micron wavelength range (infrared). This coating is intended to be applied on highly conductive material (e.g. aluminum, copper) of surface with diameter ranging from 10 to 30 cm
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