Home Theater Forum and Systems banner

Status
Not open for further replies.
21 - 40 of 1474 Posts

·
Registered
Joined
·
2,234 Posts
Discussion Starter #21
Re: Black Widow PFG

Edit...Anyone care to estimate what the gain is of the Black Widow screen..
That opens a whole can of worms! ;) Guessing that is...

We will have gain readings done but mech's waiting on his block of reference magnesium.
 

·
Premium Member
Joined
·
368 Posts
Re: Black Widow PFG

I went slightly different, my mix is Benjamin Moore Chantilly Lace, @ 4.5:1

This was an EZ job.
I mixed the 558 paint by hand (as specified by the label),and combined the 2 products the same way..

I used a 1/4" Nap roller

Piece of cake, awesome results.
 

·
Registered
Joined
·
2,234 Posts
Discussion Starter #23
Re: Black Widow PFG

muzz that biplane shot looks really good. You can see the individual rivits and that's some good detail to pick up from a projector and a screen shot. :)
 

·
Banned
Joined
·
14,914 Posts
Re: Black Widow PFG

Mech..Is that shot of the roof paint very close to the actual colour?
If it is, then that's a very dark aluminium paint!

If I could find a similar roof paint in a local brand, that looks that colour, then it might work..

Edit...Anyone care to estimate what the gain is of the Black Widow screen..
No gain readings yet. But as Bill said that opens a big can of worms. I lean the way smokey has taught me lately that gain is irrelevant! :hide:

That is the actual color of the paint. It is rather dark, which I would attribute to the small amount of asphalt in it. We would have preferred to go with the original solution that was a plain ole water based aluminum paint, but it's been discontinued. :dontknow:

As I said previously, I am tinkering with something that might be easier. However it may not be cheaper! :spend:

Now back to my clear coat lab...:nerd:

mech
 

·
Premium Member
Joined
·
368 Posts
Re: Black Widow PFG

Yeah, I like that pic, it is the EXACT frame shown elsewhere, produced by a MUCH more expensive setup.
My pic is by a AX100U Pannny LCD @ 720P, with >1900 hrs.

The one shown isn't overexposed, or blooming badly like the one it copied.
All folks need to do to compare the 2, is look at the blue sky above the pilots head to see what I am talking about.... the other pic is pretty much bright white, there is no blue sky.....

There IS a blue sky patch there!!

So obviously I had to be mindful of the contrast on that pic to show it like it really is... the other pic?

Well.. overexposed or blooming badly... I wasn't there to see.
 

·
Registered
Joined
·
2,234 Posts
Discussion Starter #28
Re: Black Widow PFG

Prof I will say seriously that there is some viewing cone so that means there is gain, but how much, we can't say right now until it's tested.
 
T

·
Guest
Joined
·
0 Posts
Re: Black Widow PFG

Great jobs guys and thank you. I assume an Designer White substrate will work for this or are you using something else that is better recommended? Thanks.
 
T

·
Guest
Joined
·
0 Posts
Re: Black Widow PFG

wow, I checked all the places listed on Henry's site and no one around me here even know's about this manufacturer. If anyone plans on buying these in bulk and willing to ship, let me know. Thanks.

Seems the minimum is 1 gallon
 

·
Registered
Joined
·
69 Posts
Re: Black Widow PFG

It would be interesting to make up some PFG with the Auto Air Aluminum (AAA:bigsmile:) product. I still have some left over. Although, I would have to use the Behr 4850 white paint as the base. This paint is awesome guys. I think it would be as good if not better than the other white paints you have tried. The good thing about using the AAA is it does help with spraying as it was designed to be sprayed. Just a thought, Or is that 2 thoughts?
 

·
Registered
Joined
·
92 Posts
Re: Black Widow PFG

Looking good guys, with the correct measurements of importance now being done it shows how good and how bad some early work was.

The most colour uniform screens have a unity gain of one. The moment you have gain you risk colour shifts off axis and in some cases on axis. ie a wide 35degree viewing angle and a high gain will appear non uniform across the width.

The spectrum for a perfect screen is perfectly flat. For those unaware, these spectrum readings are how the material responds to light as radiation. The material or surface needs to equally absorb or reflect the viewable spectrum no matter what the source.

The PFG screen spectrum looks good, however being a perfectionist I think some areas need attention. The result from the mix appears to create a curve, convex in relation to the reflected light. Slightly more dropoff at the Blue end of the spectrum.
The issue of this is because of how a PJ creates it's light and reflected difference at different percentage luminances. Ie creating the 11 point black to white ramp.
Because the PJ spectrum of light is lumpy in nature (even at D65) the effect of a non flat spectral surface is minor shifts in peceived colour balance as the PJ stimulas is raised and lowered. In effect with the Blue end spectral reflective response dropping away the perceived center weight of seen blue colour will shift to the left and right as the simulas ramps up and down.
It is our perception of the resulting colour shift that is important.

The base shade of TV mist is possibly too flat and/or the 588 has a minor convex curve to it which is hard to see. I suspect the 588. To compensate have a look for a shade which is slightly high Blue, low Green and high Red. B230,G228,R230 for example.
If you get the idea a slight concave nature.
The resulting spectrum mix with the 588 would in theory result in a flatter appearence.

:bigsmile: teehee another 20 hours homework for Mech:whistling::whistling::crying:
 
T

·
Guest
Joined
·
0 Posts
Re: Black Widow PFG

Reading the Henry 558 PDF docs said it replaces ProGrade #818 AquaBrite and Henry #229 Aluminum Emulsion. I wonder if those are easier to obtain and if it is the same product?
 

·
Moderator Emeritus
Joined
·
3,772 Posts
Re: Black Widow PFG

Great jobs guys and thank you. I assume an Designer White substrate will work for this or are you using something else that is better recommended? Thanks.
When I sprayed my Black Widow mixes the first time, I used some TWH (melamine coated hardboard); the second round I used regular hardboard that had been primed with Kilz 2. The Kilz 2 primed HB gives slightly brighter colors in my limited testing, but this could also be due to a change of spraying technique for that panel as well. The paint sticks to Kilz 2 MUCH better than to the TWH, and I would suspect the same would hold true for the laminate.

The bottom line is you can spray your DW if you want to. I don't know about rolling.

H.
 

·
HTS Senior Moderator
Joined
·
8,367 Posts
Re: Black Widow PFG

Prof I will say seriously that there is some viewing cone so that means there is gain, but how much, we can't say right now until it's tested.
Aaah...Now we're talking..
So we are definitely talking higher than 1.0..A little viewing cone loss wont bother me..
 

·
Banned
Joined
·
14,914 Posts
Re: Black Widow PFG

:bigsmile: teehee another 20 hours homework for Mech:whistling::whistling::crying:
Have you met my wife? She wants to meet you.... well not so much meet.... :foottap:


:rofl::rofl::rofl::rofl::rofl:

On a serious note, we did try what you proposed with Violet Disguise - 239 236 240. If you go and look at the master list it gave us fits! All three of us (Bill, Jim, and myself) thought it would be ideal, and yet it failed...:dontknow: :scratch:

mech
 

·
Banned
Joined
·
14,914 Posts

·
Banned
Joined
·
14,914 Posts
Re: Black Widow PFG

wow, I checked all the places listed on Henry's site and no one around me here even know's about this manufacturer. If anyone plans on buying these in bulk and willing to ship, let me know. Thanks.

Seems the minimum is 1 gallon
Yep. We're not happy about that, but what can we do? We had originally thought that we could buy a bunch of this stuff and sell it at cost to members. But that opens us up to tax issues and a whole slew of other issues. However if someone were to buy a gallon, I'm sure they could find some folks willing to buy the excess from them at cost. You could always label it as BBQ sauce when you ship it! ;)

mech
 
21 - 40 of 1474 Posts
Status
Not open for further replies.
Top