. Elementary and dental radiography / by Howard Riley Raper . elanterns manufactured by photographic supply manufacturers, its actionon a plate or film may be disastrously different. The lantern shown inFig. 68 consists of a i6-candle power incandescent light with a frostedglass bulb, in a light-proof tin box. the front of which is of removableglass. The light shines first through the frosted glass of the bulb, thenan orange-colored glass, then a ruby glass. In the dark room, with only the light of the dark room lantern we MAKING RADIOGRAPHS 69 open our box of plates,* take out one. carefully
. Elementary and dental radiography / by Howard Riley Raper . elanterns manufactured by photographic supply manufacturers, its actionon a plate or film may be disastrously different. The lantern shown inFig. 68 consists of a i6-candle power incandescent light with a frostedglass bulb, in a light-proof tin box. the front of which is of removableglass. The light shines first through the frosted glass of the bulb, thenan orange-colored glass, then a ruby glass. In the dark room, with only the light of the dark room lantern we MAKING RADIOGRAPHS 69 open our box of plates,* take out one. carefully close the box, and placethe plate in an envelope of black, light-proof paper just large enough toreceive it. Now place plate, black envelope, ct al, in another envelopeof black or orange-colored paper, putting the open end of the first en-velope in first. We may now expose this package to ordinary daylightand artificial light with impunity, and the plate is ready for use in themaking of a radiograph. These envelopes are obtained from the Fig. Showing how tu lian plate by its edges. While in the dark room, before putting the plate in the envelope, wemust note which is the sensitive side, and bear this in mind until theoutside envelope is marked properly to designate it. As formerly stated,the sensitive side is a little less glossy. Another way to determine whichis the coated side is to look through the plate just at the edge. Whenthe glass side is up. one is able to look through the glass and see the filmbeneath. The sensitive side of the plate should present toward thesmooth side of the envelope—away from the seam side. The plate should be handled by the edges. (Fig. 69.) This appliesto the handling of the plate at all times, and to the handling of the filmas well. Unless the fingers are wet or greasy, touching the sensitive side *Experienced photographers prefer to handle sensitive plates in absolute dark-ness, and soon learn to detect the film side of t
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