Black Widow PFG - the Discussion - Black Widow

[mechman]

jegyed wrote:

Wish I read this before I got to impatient and purchased a 5 gallon bucket of BlackJack at Lowes. They at least marked it down for me because it was the last one. Back to HD to order a gallon of 588. May just do the SW grey for now.

Was it the actual water based version? We've only found it at Walmart.

mech

[jegyed]

Harpmaker wrote:

To be fair, fabric can be tougher to match than a flat paint. I do understand though.
The offer still stands.

Before you drive all that way to the True Value store, make sure you have the formula for Winter Mist with you! Some stores don't have it, or look up the wrong tint values (been there! ).

WQ

[jegyed]

The blackjack is water based however it the label says "gel paint". This is to keep the aluminum suspended. That could be an issue.

[mechman]

jegyed wrote:

The blackjack is water based however it the label says "gel paint". This is to keep the aluminum suspended. That could be an issue.

Bill - did your can say this?

mech

[wbassett]

I say take it back to Lowes and get your money back, unless you were planning on using the other 632 ounces for something else , in which case keep it for that.

I'm not really sure what you got. What does it say on the side as far as the product #? What I was using was just a general purpose water based aluminum paint.

Mine is High Reflectance All Purpose Aluminum Paint #5168
Contains

• Resin
• Mineral Spirits
• Aluminum
• Water

How much did it cost? Here it's $55 for a five gallon bucket.

[jegyed]

The product is "BlackJack Aluminum Roof Coating #71"
" The Best and Brightest etc..." I double checked and it is water based. The price at Lowes is $37.50, but the department manager told me that sales were slow so they were going to discontinue it at this store. He gave it to me for $17.00 to get rid of it, so taking it back is not much of an option for me.

[wbassett]

$17 wasn't that bad then.

I do believe that has fibers in it too, maybe not though, I couldn't find #71 on their website either. Usually roof coatings do have other things in it in addition to just the binder, water, and aluminum.

You might be able to find something that works with it, but honestly we would have no idea what to use as a base since we have no data on it. If it's anything like the other aluminums, you'll want to use a warm white, but I can't promise how it will turn out. Look at it this way, you have more than enough to play with until you find the right combination

[benven]

<^..^>Smokey Joe wrote:

Good question.

With a 0.8~1.2 screen it is unlikely to see much difference, however moving further away either direction and you alter the "L" in Lab enough so that the light that scatters more readily,ie Blue end of the spectrum, will behave differently than the Red end of the spectrum, then the ab functions may drift when viewing off axis.

We are looking uniformity across the width here.

Not to nit pick. But 0.8-1.2 is a 50% difference in gain!! That alters L alot. If we say unity gain +/- 5%, that would make more sense to me. That isn't too difficult to hit. It just seems pointless, to me, after doing all that work to get a neutral gray that you would ruin it with such a gain spread.

[benven]

On another note, what is the difference between using aluminum flakes and the silver mica flakes that I have been using? I easily attained a neutral, or really close to neutral, paint mix with them.

[mechman]

benven wrote:

On another note, what is the difference between using aluminum flakes and the silver mica flakes that I have been using? I easily attained a neutral, or really close to neutral, paint mix with them.

Well you're main mix doesn't seem to have little prisms in it like the pearls and what not I've seen. Proof was in the magnification! Haven't seen teh topcoat yet though. I am a bit wary of it. But I also trust you.

Personally I like your mix! And I even recommended it elsewhere to the lower lumen crowd. I think that CGiv and the Black Widow compliment each other nicely here! I think of CGiv as kind of a SILVER killer. Maybe we should move this conversation to the CGiv thread though!

And I really really really will get around to testing gain. But first I gotta figure out how exactly. With my spectro that is. But Sunday is the Super Bowl and we have guests coming and I also have a 92" Elite Silver Frame screen sitting in a box in my office that I have to review. And then hopefully box it back up and give it away to a member.

mech