F. H. Richardson's bluebook of projection (1935)

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142 RICHARDSON'S BLUEBOOK Of PROJECTION 2 1 . What does Table No. 6 show ? 22. Should exhibitors accept unsupported statements regarding the reflection power of certain substances? . * ■ Q . 23. What is the relative reflection power of certain substances? 24. How would you analyze Table No. 6? 25. What screen attribute is more important than the amount of light reflected? Light Tone, page 153 26. May the tone or color of light be affected hv,a screen surface without tinting the surface? -j ' .*tj 27. What kind of screen surface should be selected when Mazda is used? 28. What is the problem when a high power arc light source^ is used? /.. , Type of Surface, Side Angle Distortion,' page 153 29. What is the difference between a "specular" and a "diffusing" screen? **v 30. What decides which type of screen surface is needed^n your theatre? 31. What knowledge is useful in the selection of a proper screen for a particular theatre? How may such knowledge be obtained? — 32. Why will those seated at a "heavy" side angle to the screen see objects at less than their true width and seemingly abnormally tall? 33. What is the one possible remedy for this condition? 34. What screen is best where "heavy" viewing angles are involved? Screen Mounting, page 155 35. What is the best screen mount? Cleaning Screens, page 156 36. Is it true that any screen surface can be cleaned to restore 100 percent of its reflection value?