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Projection and the Screen 405
excusable. Such glare spots may be caused by light reflected from orchestra stands, the highly polished surface of the piano or the organ, from the back-stage lights, and from aisle and exit house lights. In small theatres, even stray light from the projection room can cause glare spots on the screen. In such cases the portholes should be more carefully masked with light tin.
Maintenance.
The maintenance of the screen is most important. In a month the dust that settles on the unprotected screen will cut down reflection from 1 0 to 15 per cent. Therefore, during the cleaning hours especially, a protective curtain should be hung directly in front of the screen. In fact, when the screen is not in use it should be protected by a curtain. But no matter how carefully the screen is protected, it requires regular dusting and brushing. The type of screen will determine how this should be done, and if there is any doubt, the manufacturer will send instructions on the matter. Besides the regular dusting, some screens require washing. If the manager doubts how important screen maintenance is, let him clean one-half of the screen that has been neglected for a few months, then see the difference in projection between the clean and the unclean half.
It is advisable that the audience never see a blank screen. Traveler curtains can be used to catch the title and then be parted at the end of the credit titles — and they can be used at the close of the program. It was explained that illusion was necessary for entertainment. The blank screen at any time makes it so much harder to create that illusion.
Conclusion.
As far as the manager is concerned, good projection depends upon three things: technical knowledge, good business sense, and a personality that will develop the proper relationship with the projectionist. All three are essential. Intelligent supervision will be difficult unless there exists a spirit of cooperation and mutual understanding between the manager and the projectionist.