drawbacks of using a grey screen?

keyser

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What are the drawbacks of using a grey screen(instead of white 1.0) that has gain of about 1.0-1.5?

The grey is better for rooms that have some reflections, and the gain gives a brighter pic... are the drawbacks a more limited viewing angle and possible hotspotting? How bad are those with the firehawk and Da-Lite HCCV(has a little less gain)?
 
Limited viewing angle and/or possible hotspotting are artefacts of a screen with gain - not of greyness on its own.

In the case of a grey screen, then the natural colour (depending on the shade) might result in a gain of 0.9 (in other words, a loss of, say 10%). So, a grey screen with a 'gain' of 1 actually DOES have some gain, to overcome the greyness. And therefore its viewing angle will be limited.

True to say that the greater the gain, the greater the risk of these artefacts affecting you. At 1, you probably won't notice. At 1.5, you might.
 
Apparently however there are now higher gain screens with very little viewing angle restriction..... which of course contradicts the theory so i dont know how they work!

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