Thanks Prof for confirming that... saved some time as far as doing any gain tests!
The only one out of the six that I would say is even close to usable is the Neutral White. It is red deficient, Prof even said that may be okay and it's only a few points low. It is the closest to a neutral line than any of the others (Guess Neutral White was a good name then right?)
Here is why I am going to say no to it... It does not match the color curve of known data sampled from actual screen material. I have been thinking this for a very long time now, and even said it a few times and it was dismissed on other threads, although I am not totally sure why... We are always in search of a perfectly neutral screen, be it white or gray. What if that mind set is wrong?
Okay follow me on this, and Clarence, Ericglo, and Prof you guys are the ones I am hoping can think this over and confirm what I am thinking or dispell this once and for all for me... Commercial screen manufacturers have a lot of money they spend on research and development. I don't doubt that the cheaper companies spend less on R&D or are even using inferior screen material actually provided to them by the big companies. That may sound nuts but it's not an unheard of concept. It is done all the time in the electronics field. JVC makes receivers and DVD players for other companies, but they are never as nice or as high of quality as the ones sold under their brand name. The logic makes sense: They make a little money selling inferior units to another company, other wise they would make NOTHING. So a little is better than zero, plus they know people that want quality will buy their brand.
Back to screen manufactures... These large companies literally have millions they spend on R&D for their screens, would everyone agree with that? So if it was possible to create a perfectly neutral screen they would have figured it out. That brings up the question of why they don't make their screens neutral. If they can't, then all this talk and searching for the elusive neutral gray screen in here is meaningless. If companies that have millions at their disposal can't do it, we most certainly can't do it. I don't think that is the case though. I think they can make a screen that is as close to neutral as you can get... so again why don't they?
Below is the original graph of the color swatch that was created back in the Screen Color Match thread, and the one I have posted earlier in this thread too.
All of the commercial screens sampled have a slight green deficiency. Granted this is not every screen out there, but isn't it interesting that every one of the screens that were sampled all have the same basic characteristics?
Now look at the Wilsonart graph again
We see the same characteristics with everything except Pewter.
There has to be a reason why the commercial screens sampled all show the same green deficiency as part of their characteristics. Whatever that reason is, shouldn't we be looking at that as a baseline model when making a DIY screen? I agree that DIY offers a level of customization and the ability to mate a screen to an individual projector that is not economically feasible for the commercial companies. However I really feel that we should be looking at what they do as a foundation.
Prof said before that we all have been conditioned since birth to 'see' colors a little different than they actually are. A pure neutral gray will almost look greenish to most people and is a very ugly color. Someone once said they asked a paint shop if they could mix a neutral gray and the reply was along the lines of 'Why in the world would anyone want an ugly color like that?' Prof suggested one possible reason for the green deficiency was to ensure skin tones don't look greenish. Sure the projector could be adjusted to compensate, but then that screen would be viewed as one that shifts colors and doesn't give a pure image (even if perhaps that image is more realistic, it's not what we perceive as being ideal)
How many have I lost? Check out the special features on Land of the Dead. I have seen this on other DVDs too, but it was the most pronounced on this DVD and special features: They show the closing scene where the heros are driving away in their big rig. The first pass is exactly how the camera filmed it. It was real, but not 'movie real' so they ramped up the colors, darkened the sky, change the whole scene to one that 'looked more real'. I think that same idea of perceived reality comes into play with why they make screens that have a slight green deficiency.
With that said, and if I am even close to right, then if we find a truly neutral screen material, we will skew the colors. The shift may be slight, but it will be a shift none the less. Then we will make adjustments at the projector to take the screen image back towards the desired color balance everyone is used to... so in affect we would be compensating for the screen again and if it was slightly green deficient in the first place perhaps we would have left things alone. Now is what I am saying making sense?
I have also heard that digital projectors, especially LCD projectors have a green push, but I have not seen anything to confirm that, and it really doesn't make sense. If that were the case then there would be screens specifically labeled for LCD only and DLP only... StudioTek isn't exactly known as a budget low quality screen, and it shows these exact characteristics that I am talking about, so we can't say this is a characteristic of inferior screen design.
Wilsonart has the same slight green deficiency, while Formica actually has a slight green/blue push. For whatever reason they did this, Wilsonart unknowingly matches or is very close to matching the same characteristics of quite a few manufactured screens.
In closing, I am in no way saying my thoughts are right or definative, what I am doing is questioning why we see so many screens with a green deficency, and why are we trying to make screens that go against the model that professional screens provide? I feel we start there as the foundation and if need be try to improve things from there... and not reinvent the wheel. Did any of that make sense?
I am very interested to get some data on Pionite now too...