Diffuse Black Coatings and Materials
Avian Black-S Coating
Avian Black-S coating is a spray on, two part water based urethane coating that exhibits low
reflectance over a wide wavelength range. The water-borne coating exhibits very low gloss and is
quite durable compared to most low reflectance coatings. It is easily mixed and may be applied with
standard spraying equipment. Cleanup is easily done with water and detergent.
The coating passes and exceeds Mil spec for live agents and durability. It is a low VOC
coating (<1.8 lbs/gallon) and is non-flammable as applied.
The reflectance is <3.5% over most of the UV-Vis-NIR and appx. 3% over most of the range.
Avian Black-S
Typical 8°/Hemispherical Reflectance Data
| Wavelength |
Reflectance |
|
Wavelength |
Reflectance |
|
Wavelength |
Reflectance |
| 250 |
.040 |
|
800 |
.032 |
|
1600 |
.031 |
| 300 |
.034 |
|
900 |
.030 |
|
1800 |
.033 |
| 400 |
.032 |
|
1000 |
.029 |
|
2000 |
.035 |
| 500 |
.031 |
|
1100 |
.029 |
|
2200 |
.037 |
| 600 |
.031 |
|
1200 |
.029 |
|
2400 |
.038 |
| 700 |
.032 |
|
1400 |
.030 |
|
2500 |
.040 |
| Physical Properties: |
- Gloss: 1%< @ 60°, <3.5% @ 85° Flexibility:
Pass 1/8" Mandrel 180° bend
- Viscosity: 70-75 KU Pot Life: 4 hours
- Coverage: 640 sq. ft. /gallon at 1 mil thickness
- Air Quality: <1.8 lbs/gallon V.O.C.
- Weathering: QUV >1000 hrs. Xenon Weatherometer >2000 hrs. no change
- Chemical Resistance: Water >168 hrs. immersion
- Hydrocarbon TT-S-735 Type III: <168 hrs. immersion
- 10% Acetic Acid: 1 hour spot
|
The coating may be applied over most primers. Typically a 1-2 mils thickness gives full opacity.
Avian Black-S is available as a kit that makes appx. 1.5 liters of coating. Please call for larger quantity prices.
| Part # |
Description |
| Avian-BKS-QT |
1.5 Quart Avian-Black S Coating |
Avian-DS Black
Avian-DS black is an etch-anodize process similar to what was known as Martin Black. Avian-DS, however, is even more absorbent of light. It is the blackest material we've seen in almost twenty years in this field. Coating is limited to parts fabricated from aluminum. This is a batch process, so small lots tend to be very expensive but the coating is economical for large lots or OEM quantities. This coating can only be applied to aluminum substrates.
We are working to extend the range of Avian-DS Black further into the NIR. The data shown is for our most recent iteration of the process. Please call us for pricing on Avian-DS Black.
Avian-DS Black
Typical 8°/Hemispherical Reflectance Data
| Wavelength |
Reflectance |
|
Wavelength |
Reflectance |
|
Wavelength |
Reflectance |
| 250 |
.009 |
|
800 |
.006 |
|
1600 |
.223 |
| 300 |
..007 |
|
900 |
.008 |
|
1800 |
.305 |
| 400 |
..008 |
|
1000 |
.011 |
|
2000 |
.335 |
| 500 |
.006 |
|
1100 |
.020 |
|
2200 |
.355 |
| 600 |
.006 |
|
1200 |
.043 |
|
2400 |
.354 |
| 700 |
.006 |
|
1400 |
.123 |
|
2500 |
.328 |
Avian-EP Black
Avian-EP Black is an electrochemical process that can be applied to almost any substrate including plastic or glass. The coating is highly diffuse but somewhat fragile, so its use in applications that require handling of the optical surface are not recommended.
Optically, Avian-EP Black is very highly absorbent in the UV-Vis-NIR and has better range than Avian-DS Black (above). The coating remains 'black' out to 7-8 microns.
As with Avian-DS Black, Avian-EP black is a batch process, so small quantities may be expensive but in OEM quantities, the process can be quite economical. Please call us for pricing on Avian-EP Black.
Avian-EP Black
Typical 8°/Hemispherical Reflectance Data
| Wavelength |
Reflectance |
|
Wavelength |
Reflectance |
|
Wavelength |
Reflectance |
| 250 |
.010 |
|
800 |
.028 |
|
1600 |
.029 |
| 300 |
..011 |
|
900 |
.044 |
|
1800 |
.029 |
| 400 |
..013 |
|
1000 |
.040 |
|
2000 |
.030 |
| 500 |
.012 |
|
1100 |
.036 |
|
2200 |
.033 |
| 600 |
.011 |
|
1200 |
.034 |
|
2400 |
.035 |
| 700 |
.013 |
|
1400 |
.031 |
|
2500 |
.036 |
| 