File:The lighting of printing plants - information compiled by A.D. Bell. (1920) (14597069778).jpg

Identifier: TheLightingOfPrintingPlantsInformationCompiledByA.d.Bell
Title: The lighting of printing plants / information compiled by A.D. Bell.
Year: 1920 (1920s)
Authors: Harrison, N.J. : Edison Lamp Works of General Electric Co., 1920.
Subjects: electric lighting -- catalogs industrial lighting -- catalogs Division 26 interior lighting fixtures, lamps, and ballasts
Publisher: Edison Lamp Works of General Electric Co.
Contributing Library: Canadian Centre for Architecture

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of local lamps usually placed inhalf shades which generally throw the light on the proof and thekeyboard. This does well enough but the rest of the room as awhole should be illuminated by a general system so as to providean even intensity of from 5 to 7 foot-candles. An evenly lighted room is mucli more satisfactory and it is morecheerful to work in, and can be kept cleaner and In better order thanone where there are dark areas. Moreover, a bad condition for theeye is produced where one works in a small area of bright illumina-tion surrounded bv darkness. THE LIGHTING OF PRISTISG PLANTS 11 i t In Fig. 3, the linotype room, general illumination is providedby 100-watt bowl enameled Mazda C lamps in RLM StandardDome Reflectors on centers 11 by 8 feet hung about 10 feet abovethe floor. A similar layout should be provided in rooms of otherdimensions than the one shown. In the main composing room, where all the work is done byhand, a system of localized general lighting should be eniploved.
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Fig. 7. The Press Room of a Large Publishing Concern as it Appears by Night Lightedby 150-watt Bowl Frosted .\LiZDA C Lamps in Porcelain Enameled Dome SteelReflectors. These are hung 11 feet above the floor on centers 10 by 18 feet.The localized general system recommended is followed out. It is inter-esting to note the application of white enamel paint to the pressescreating excellent diffusion which tends to eliminate shadows and making the lighting system very effective The work requires a very fine discrimination of detail, especiallywhere the smaller varieties of type are used. Good lighting hereis an especial asset, for errors will be eliminated, decreasing thenecessity for changes in the proof, a costly and delaying process. As racks are usually symmetrically spaced, an even distributionof illumination will be provided even though the localized generallighting scheme is followed. In the plan of a composing room(Fig. 3) two units, RLM Standard Dome Reflectors with 100-watt y 12 T

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