Munsell N5 - Page 2 - Home Theater Forum and Systems - HomeTheaterShack.com

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post #11 of 35 Old 09-11-10, 02:44 PM
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Re: Munsell N5

Quote:
Harpmaker wrote: View Post
I have an updated Behr N5 formula for those following this thread.

Behr ULTRA
8 oz. sample
Deep Base
B - 0 - 85
C - 0 - 11
F - 0 - 4
KX - 0 - 170


L*a*b*: 49.48, -0.03, -0.32
RGB: 117.3, 117.7, 118.1
Color Temperature: 6565.7K

Any Home Depot should be able to make 8 oz. samples, quarts and gallons from this formula; just multiple the tint amounts by 4 to make a quart, and by 16 to make a gallon.
would this be better than the "viel" i was gonna use in the thread further down?
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post #12 of 35 Old 09-11-10, 06:39 PM
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Re: Munsell N5

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tonydp wrote: View Post
would this be better than the "viel" i was gonna use in the thread further down?
No, you would have to be using a really small screen and/or a really bright PJ to use a "non-enhanced" N5 paint for a screen (I've tried it). A flat N5 gray only reflects 18% of the light that hits it (it's a bit darker than the paint you used for your walls). While getting it in an eggshell finish would increase gain a bit over that, it would still be a very dark screen. Stick with the N7.5 Glidden 'Veil'.

When time permits we will be looking into darker screen mixes, but that won't be until some time next year - our dance card is full right now.
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post #13 of 35 Old 02-19-13, 02:02 PM
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Re: Munsell N5

back from the dead this thread is... I wanted to point you all to this page, which has the gallon and quart formulas for they Behr Ultra gray.
http://www.flandersscientific.com/in..._resources.php

Never take a photographic Kodak 18% gray card to the paint store and have them match it. You can have 2 gray cards, one with a yellow tint, another with a green tint and they will be measure as 18% reflective. Reflectivity values care nothing of hue.

Also, one thing that is important to remember is that there are 2 reasons to use neutral gray. One, when used with biased lighting, it provides comfort to the viewer because it stabilizes the irises. The second is to provide a consistent "white balance" for the eyes, giving a constant reference in the peripheral area around your display/screen, eliminating the negative effects of simultaneous contrast. More on that here:

http://www.webexhibits.org/colorart/contrast.html
http://colorusage.arc.nasa.gov/Simult_and_succ_cont.php
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post #14 of 35 Old 02-19-13, 03:23 PM
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Re: Munsell N5

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Jason McKelvey wrote: View Post
back from the dead this thread is... I wanted to point you all to this page, which has the gallon and quart formulas for they Behr Ultra gray.
http://www.flandersscientific.com/in..._resources.php
Wow, I wonder where they got that formula from... oh yeah! US! The joke is on them though because they got both the quart and gallon formulae wrong!
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post #15 of 35 Old 02-19-13, 03:28 PM
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Re: Munsell N5

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... they got both the quart and gallon formulae wrong!
Do you have the gallon formula?
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post #16 of 35 Old 02-19-13, 03:39 PM
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Re: Munsell N5

This is what I came up with:

Colorant---BL---CL---FL---KXL
OZ--------3----0----0----7
384th-----54---176--64---0
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post #17 of 35 Old 02-19-13, 03:46 PM
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Re: Munsell N5

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Jason McKelvey wrote: View Post
Do you have the gallon formula?
It's given at the bottom of post #12 in this thread, or rather the way to find it from the 8 oz. formula. Don't forget that 384/384th = 1 oz. of tint so 385/384th oz. of tint would equal 1 oz. and 1/384th oz. of tint. You shouldn't need to bother though just multiple the 8 oz. tint amounts by 16 and give them to the paint-person at Home Depot, their computer should make the correction automatically.
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post #18 of 35 Old 02-19-13, 03:59 PM
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Re: Munsell N5

This is what I came up with:
Got it.

Colorant---BL---CL---FL---KXL
OZ--------3----0----0----7
384th-----208--176--64--32
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post #19 of 35 Old 02-19-13, 04:00 PM
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Re: Munsell N5

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Jason McKelvey wrote: View Post
This is what I came up with:

Colorant---BL---CL---FL---KXL
OZ--------3----0----0----7
384th-----54---176--64---0
Nope. Think base 384 math. You're not converting the mantissa back into 384ths

Do you really need a gallon of N5 paint or is this simply an intellectual exercise?
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post #20 of 35 Old 02-19-13, 04:02 PM
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Re: Munsell N5

Quote:
Jason McKelvey wrote: View Post
This is what I came up with:
Got it.

Colorant---BL---CL---FL---KXL
OZ--------3----0----0----7
384th-----208--176--64--32
BINGO!
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