What material do suggest using for making a test panel? Sheetrock is a little dusty.
I've always used 1/8" tempered hardboard because it is inexpensive, light and the stores will cut the panels to size for me. Mech has just switched from hardboard to posterboard I think, I'll have to find out more about that.
Just for grins, we'll do a panel of Kilz and one of the Electra mix. I tend to like the color depth achieved with the gray-screen panels. But it's my understanding that a white screen will work with my PJ.
In a totally dark room with dark walls/ceiling/floor a white screen is almost always the best screen. The problem comes when the walls aren't dark enough so light from the screen gets reflected back onto the screen which lowers image contrast and washes out colors. The more light that hits the screen that doesn't come directly
from the PJ, the worse the problem is. And if you want to have even a small amount of light in the room so people can move around safely your image quality takes an ever bigger hit. Thus the gray screen was born and the rest is history.
When we built our house 3 years ago, the hot "must have screen" was the Stewart Gray-Hawk or Fire-Hawk. Hence the decision to go with a gray type screen, and Behr Silver Screen was very popular with some additives added. A lot of people used the Silver Screen paint alone.
This was all from research at Projector Central forums. I must say that the "Shack" forum is the best.....and I've looked at quite a few lately!
Interestingly enough, if you take a look at the screen statistics of the GrawHawk G3 and a Black Widow™ screen they are virtually identical.
Adding mica to Silver Screen raises the reflective quality, and thus the gain, of the mix; but I'm not seeing a lot of extra gain from your particular formula (which is actually a good thing). Gain is something that cannot be determined by eye any better than color neutrality can be. If you ever see a gain figure given for a mix that isn't actually a measured
figure, discount it as a serious number even if it comes from an "experienced" source.
Thanks for the kudos. I'll have to admit not being familiar with the forum at PJC.
We do try here to present hard facts and not simply subjective opinions. We understand making our own screens should be fun, but we also understand that people want something that actually works well as a screen. :T
I'll have the color data for your screen mix up later tonight.