(Answer) (Category) The Solar-AC FAQ : (Category) Just the numbers: constants, conversions, tables : (Answer) Table of absorptivity and emissivity of common materials and coatings
This table is mirrored from Duane Johnson's site: Red Rock Energy http://www.redrok.com/concept.htm#emissivity

Absorptivity & Emissivity table 1 plus others.
  aS E     
  Solar Surface aS/E    
Material Absorption EmissivityratioCommentsReference
Silver, Highly polished   0.02 - 0.03  3.00 Marks (1)
Gold, Highly polished   0.02 - 0.04  3.00 Marks (1)
Barium Sulphate with Polyvinyl Alcohol 0.06 0.88     .07 The Fridge
Aluminum polished 0.09 0.03   3.00 ?
Magnesium Oxide Paint 0.09 0.90     .10 The Fridge
Magnesium/Aluminium Oxide Paint 0.09 0.92     .10 The Fridge
Aluminum quarts overcoated 0.11 0.37     .30 ?
Aluminum, Highly polished   0.04 - 0.06  3.00 Marks (1)
Snow, Fine particles fresh 0.13 0.82     .16 ?
Zinc Orthotitanate with Potassium Silicate 0.13 0.92     .14 The Fridge
Aluminum anodized 0.14 0.84     .17 ?
Aluminum foil 0.15 0.05   3.00Aluminum foil gets very hot because of this high ratio.?
Potassium Fluorotitanate White Paint 0.15 0.88     .17 The Fridge
Zinc Oxide with Sodium Silicate 0.15 0.92     .16 The Fridge
Paint, White zinc oxide 0.16 0.93     .17 ?
GSFC White Paint NS-74 0.17 0.92     .18 The Fridge
Titanium Oxide White Paint with Potassium Silicate0.17 0.92     .18 The Fridge
Zerlauts Z-93 White Paint 0.17 0.92     .18 The Fridge
Cromium   0.08 - 0.26  3.00 Marks (1)
Dow Corning White Paint DC-007 0.19 0.88     .22 The Fridge
GSFC White Paint NS43-C 0.20 0.92     .22 The Fridge
Titanium Oxide White Paint with Methyl Silicone 0.20 0.90     .22 The Fridge
Zerlauts S-13G White Paint 0.20 0.90     .22 The Fridge
Light colored paints, firebrick, clay, glass 0.04 - 0.40 0.90     .24 U of Miss
Biphenyl-White Solid 0.23 0.86     .27 The Fridge
P764-1A White Paint 0.23 0.92     .25 The Fridge
Zirconium Oxide with650 Glass Resin 0.23 0.88     .26 The Fridge
Solec LO/MIT selective surface paint 0.21 - 0.26 0.15 - 0.19  1.38LO/MIT I/II products are low emissivity, non thickness dependent coatings.Solec
Catalac White Paint 0.24 0.90     .27 The Fridge
Hughson White Paint Z-202 0.25 0.87     .29 The Fridge
Hughson White Paint Z-255 0.25 0.89     .28 The Fridge
Hughson White Paint Z-255 0.25 0.89     .28 The Fridge
3M-401 White Paint 0.25 0.91     .27 ?
Hughson White Paint A-276 0.26 0.88     .30 The Fridge
Hughson White Paint V-200 0.26 0.89     .29 The Fridge
OSO-H White Paint 63W 0.27 0.83     .33 The Fridge
Opal Glass 0.28 0.87     .32 The Fridge
Sherwin Williams White Paint (A8W11) 0.28 0.87     .32 The Fridge
Mautz White House Paint 0.30 0.90     .33 The Fridge
Snow, Ice granules 0.33 0.89     .37 ?
GSFC White Paint NS44-B 0.34 0.91     .18 The Fridge
Sperex White Paint 0.34 0.85     .40 The Fridge
Dupont Lucite Actylic Lacquer 0.35 0.90     .39 The Fridge
GSFC White Paint NS-37 0.36 0.91     .40 The Fridge
Sherwin Williams F8WJ2030 w Polasol V6V241 0.36 0.87     .41 The Fridge
Sherwin Williams White Paint (F8WJ2030) 0.39 0.82     .48 The Fridge
Tedlar White Paint 0.39 0.87     .45 The Fridge
Hughson White Paint Z-202+1000 0.40 0.87     .46 The Fridge
Aluminum paint (bright) 0.30 - 0.50 0.40 - 0.60    .80 U of Miss
Hughson White Paint A-276+1O36 0.44 0.88     .50 The Fridge
Dull brass, copper, galv. steel, aluminum 0.40 - 0.65 0.20 - 0.30  2.10 U of Miss
Colored paints, brick, light brick, 0.50 - 0.70 0.85 - 0.95    .67 U of Miss
Concrete 0.60 0.88     .68 ?
Galvanized metal new 0.65 0.13   5.00 ?
Brick, red (Purdue) 0.65 0.93     .68 ?
Concrete and stone, dark 0.65 - 0.80 0.85 - 0.95    .81 U of Miss
Galvanized metal weathered 0.80 0.28   2.90 ?
Metal, plated Black chrome 0.87 0.09   9.70 ?
Anodize Black 0.88 0.88   1.00 The Fridge
Martin Black Velvet Paint 0.91 0.94     .97 The Fridge
Solec Solkote selective surface paint 0.88 - 0.94 0.28 - 0.49  2.36SOLKOTE HI/SORB-II is an optical coating specifically formulated for solar thermal applications.Solec
Metal, plated Nickel oxide 0.92 0.08   11.00This is stainless steel heated until the nickel oxidizes.?
Metal, plated Black sulfide 0.92 0.10   9.20 ?
Pyramil Black on Beryllium Copper 0.92 0.72   1.28 The Fridge
Metal, plated Cobalt oxide 0.93 0.30   3.10 ?
Polyethylene Black Plastic 0.94 0.92   1.01 The Fridge
Martin Black Paint N-150-1 0.94 0.94   1.00 The Fridge
Tedlar Black Plastic 0.94 0.90   1.04 The Fridge
Iron and Steel, strongly oxidized   0.95   3.00 Marks (1)
Hughson Black Paint L-300 0.95 0.84   1.13 The Fridge
Paladin Black Lacquer 0.95 0.75   1.27 The Fridge
Black Crystal 0.92 - 0.98 0.08 - 0.25  5.76Thermafin's Black Crystal Selective Surface Coating.Thermafin
Carbon Black Paint NS-7 0.96 0.88   1.09 The Fridge
Carbon Black Paint 0.96 0.88   1.09 The Fridge
Chemglaze Black Paint Z3O6 0.96 0.91   1.05 The Fridge
Delrin Black Pastic 0.96 0.87   1.10 The Fridge
GSFC Black Silicate MS-94 0.96 0.89   1.08 The Fridge
GSFC Black Paint 313-1 0.96 0.86   1.12 The Fridge
Hughson Black Paint H322 0.96 0.86   1.12 The Fridge
Velesat Black Plastic 0.96 0.85   1.13 The Fridge
Solchrome 0.94 - 0.98 0.10 - 0.14  8.00Solchrome Systems India Limited.Solchrome
Ebanol C Black 0.97 0.73   1.33 The Fridge
Ebanol C Black-384 ESH* UV 0.97 0.75   1.29 The Fridge
3M Black Velvet Paint 0.97 0.91   1.07 The Fridge
Parsons Black Paint 0.98 0.91   1.08 The Fridge
Flat black paint 0.97 - 0.99 0.97 - 0.99  1.00 U of Miss
Paint, Black (Parsons) 0.98 0.98   1.00I understand this is lamp black mixed with spar varnish.?

Selective surfaces
Solec LO/MIT selective surface paint 0.21 - 0.26 0.15 - 0.19  1.38LO/MIT I/II products are low emissivity, non thickness dependent coatings.Solec
White paint 0.23 - 0.49      U of Miss
Solec SOLKOTE selective surface paint 0.88 - 0.94 0.28 - 0.49  2.36SOLKOTE HI/SORB-II is an optical coating specifically formulated for solar thermal applications.Solec
Copper, aluminum, or nickel plate with CuO coating0.08 - 0.93 0.09 - 0.21  3.37 U of Miss
Black Crystal 0.92 - 0.98 0.08 - 0.25  5.76Thermafin's Black Crystal Selective Surface Coating.Thermafin
Copper treated with NaCIO2 and NaOH 0.87 0.13   6.69 U of Miss
Solchrome 0.94 - 0.98 0.10 - 0.14  8.00Solchrome Systems India Limited.Solchrome
Metal, plated Black sulfide 0.92 0.10   9.20 ?
Metal, plated Black chrome 0.87 0.09   9.70 ?
Metal, plated Nickel oxide 0.92 0.08   11.00This is stainless steel heated until the nickel oxidizes.?

Source: http://www.redrok.com/concept.htm#emissivity
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