Home Depot Formula - Home Theater Forum and Systems - HomeTheaterShack.com

Old 08-24-10, 09:33 PM Thread Starter
Shackster
d rock

Join Date: Nov 2007
Location: Upstate NY
Posts: 14
Home Depot Formula

O.K. all,

I am building a H.T. in my basement. I have read many posts and looked at many DIY screens and decided for as
follows:

I would recommend the new Behr ULTRA Interior #1750 tinted as follows:

~N8.5 DIY Tint {Medium Gray}
Quart Custom Tint
Behr UPW 1750
048 Lamp Black
011 Brown Oxide
005 Medium Yellow
The folks at Home Depot will understand what to do with those formulas.

The problems is that my Home Depot people didn't know what to do with the formula I gave them.

I thought I read somewhere that the 0 - 4 - 8 stands for (ounces) - (drops) - (1/2 drops).

Is that correct. Just so you know I have a Sharp DT-500 and am making a 106" diag. screen out of MDF.

I did do a search for this, but came up with a ton of info. and none of it pertaining to the formula itself.

Thanks, D rock
D rock is offline

Old 08-25-10, 01:42 AM
Shackster
Robert

Join Date: Feb 2009
Location: Sweden
Posts: 93
Re: Home Depot Formula

Sorry, no clue. Where did you get the formula from? Here in HTS?
robert_1967 is offline
Old 08-25-10, 02:08 AM
Moderator Emeritus
Don

Join Date: Oct 2007
Location: Central PA
Posts: 3,772
Re: Home Depot Formula

Hi D rock, welcome to the forum!

The formula you quoted has actually been updated so the values are in 384th fluid ounce increments, since most, if not all, Home Depot stores are using that system now instead of the older method that used 48th (drop) and 96th (1/2 drop) fl.oz. increments. Both systems still use ounce increments when making darker colors in gallon and 5 gallon containers.

The old method of expressing that formula is "oz - 48th oz - 96th oz":

Code:
```~N8.5 DIY Tint {Medium Gray}Quart Custom Tint
Behr UPW (1050,1750,1850,4850)
0 06 0 Lamp Black
0 01 0 Brown Oxide
0 00 1 Medium Yellow```
The new formula should have the leading zeros removed, or more properly, also include the oz. increment as follows:
Code:
```~N8.5 DIY Tint {Medium Gray}Quart Custom Tint
Behr UPW (1050,1750,1850,4850)
ounce       384th oz
0              48 Lamp Black
0              11 Brown Oxide
0               5 Medium Yellow```
The folks at Home Depot should be able to read this formula, however, I have gotten "help" at some HD stores where the person didn't know which end of the can the paint went into... well OK, it wasn't quite that bad - but close!

Also keep in mind that the above formula is for an approximate N8.5 shade. The last I knew they hadn't been tested for accuracy.

A dead-bang neutral N8.5 gray formula for use in Valspar paint (Lowe's) is:
Code:
```N8.5 Valspar Ultra Premium Enamel flat or Signature matte
1 Quart
Base 1
101 - 3
109 - 0.25
114 - 0.5```
And we don't recommend adding any water-based polyurethane to your mix, the bad effects outweigh the good.

BTW, Lowe's uses a tinting formula method in ounces and 48th ounces, but they fractionalize it, so "3" means three 1/48ths of an ounce. Lowe's system is less intuitive than Home Depot's, but it is twice as accurate since the smallest amount of tint that can be used in a Lowe's formula is twice as small as that used in Home Depot's. Not than anyone but us crazy people care.
Harpmaker is offline
Old 08-25-10, 06:36 AM Thread Starter
Shackster
d rock

Join Date: Nov 2007
Location: Upstate NY
Posts: 14
Re: Home Depot Formula

Thanks for the fast reply Harpmaker. You seem to know quite a bit about this subject and your avatar is a spray gun (cool). I plan on rolling this paint on with a thin roller. I am using this screen for both movie and sports viewing with some ambient light (dimmer on can lights - no windows). Is the tint you suggested the right tint for me? If you need more info. just let me know. Thanks, D rock
D rock is offline
Old 08-26-10, 08:38 AM
Elite Shackster

Steve Mechelke -mech

Join Date: Feb 2007
Location: Empire Township, MN
Posts: 14,914
My System
Re: Home Depot Formula

Quote:
D rock wrote: View Post
Thanks for the fast reply Harpmaker. You seem to know quite a bit about this subject and your avatar is a spray gun (cool). I plan on rolling this paint on with a thin roller. I am using this screen for both movie and sports viewing with some ambient light (dimmer on can lights - no windows). Is the tint you suggested the right tint for me? If you need more info. just let me know. Thanks, D rock
What pj are you using?
How far back will it be mounted?
How big of a screen are you shooting for?
What color are the walls, ceilings, and floors?
What's the ambient light situation like?
What is the seating distance?

These questions help us determine what will fit your needs.
mechman is offline
Old 08-26-10, 09:42 AM Thread Starter
Shackster
d rock

Join Date: Nov 2007
Location: Upstate NY
Posts: 14
Re: Home Depot Formula

What pj are you using? Sharp DT 500
How far back will it be mounted? 12 feet
How big of a screen are you shooting for? 106 diagonal
What color are the walls, ceilings, and floors? Black walls and ceilings. dark red floor
What's the ambient light situation like? Dimmable can lights (no windows)
What is the seating distance? 12 feet

Read more: Home Depot Formula - Home Theater Forum and Systems - HomeTheaterShack.com
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Old 08-26-10, 05:19 PM
Moderator Emeritus
Don

Join Date: Oct 2007
Location: Central PA
Posts: 3,772
Re: Home Depot Formula

Quote:
D rock wrote: View Post
I plan on rolling this paint on with a thin roller. I am using this screen for both movie and sports viewing with some ambient light (dimmer on can lights - no windows). Is the tint you suggested the right tint for me? If you need more info. just let me know. Thanks, D rock
You pretty much have what we call a "bat cave" where the room surfaces are dark and ambient light is controllable. In such a HT the shade of screen really comes down to how well the PJ in use does with black levels, and user preference.

According to the specifications you gave for your HT set up, you are getting about 16 fL of projected light hitting your screen. This is bright enough to use even our darkest mix to date (Black Widow™ with a N value of 7.5). Since you want to have some ambient light during viewing I wouldn't recommend a white screen. A N8.5 would be OK if you are happy with the black portions and overall contrast of your images; if not go with a N8 or N7.5 mix. The darker the mix (lower N value) the darker blacks will look on the screen and the more saturated colors will appear, but the overall image will be darker. This is where personal preference comes in.

What we generally recommend people do when building their own screen is to try the screen with just the white primer on it and see how they like the image they get and take notes of what they like and dislike about the image. If they find the image is lacking contrast or has dark grays instead of blacks then we recommend a gray of one shade or another. Since you already know you want to have some light on during viewing I would skip the white screen and probably go straight to the N8.5 gray (I recommend the Valspar version if you have a Lowe's store close to you).

Be sure to calibrate the projector to the screen! This helps tremendously with getting a good image.
Harpmaker is offline
Old 08-26-10, 10:39 PM Thread Starter
Shackster
d rock

Join Date: Nov 2007
Location: Upstate NY
Posts: 14
Re: Home Depot Formula

Thanks Harpmaker,

I do have a Lowes (next to Home Depot) go figure. I will get the Lowes mix. Is there anything I should know for the Lowes people? I also want to watch sports on this screen with some ambient light as you suggested. I am going to put 2 coats of Kilz 2 on the MDF then paint with the Lowes mix.
Any other suggestions?

Thanks D.rock
D rock is offline
Old 08-27-10, 08:58 AM
Moderator Emeritus
Don

Join Date: Oct 2007
Location: Central PA
Posts: 3,772
Re: Home Depot Formula

Quote:
D rock wrote: View Post
Thanks Harpmaker,

I do have a Lowes (next to Home Depot) go figure. I will get the Lowes mix. Is there anything I should know for the Lowes people? I also want to watch sports on this screen with some ambient light as you suggested. I am going to put 2 coats of Kilz 2 on the MDF then paint with the Lowes mix.
Any other suggestions?

Thanks D.rock
About the only thing I can think of is to ask for either the Valspar Ultra Premium Enamel flat or the Valspar Signature matte before you give them the tinting information, just to keep confusion to a minimum. I've gotten assistance at the paint counter from people who really knew what they were doing, and from those that didn't really have a clue - it's kind of the luck of the draw.

Just to repeat the N8.5 formula for Valspar:

N8.5 Valspar Ultra Premium Enamel flat or Signature matte
1 Quart
Base 1
101 - 3
109 - 0.25
114 - 0.5

About the only other things I can think of is to recommend the use of quality roller covers and roller, and to use a 1/4" nap roller cover to get the smoothest finish you can. For real rolling advice someone else will have to jump in here since I haven't done that much of it, I really like my spray gun.
Harpmaker is offline
Old 08-28-10, 07:51 PM Thread Starter
Shackster
d rock

Join Date: Nov 2007
Location: Upstate NY
Posts: 14
Re: Home Depot Formula

Harpsmaker,

How do you calibrate your pj to your screen? I am a newbie to this stuff and I assume that you mean in the settings of the pj??

Thanks, D rock
D rock is offline

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