This section is from the book "Complete Self-Instructing Library Of Practical Photography", by J. B. Schriever. Also available from Amazon: Complete Self-Instructing Library Of Practical Photography.
566. The regular diffusing screen is used with an additional white shade added. This shade is attached to a spring roller at the top of the diffusing screen. When not in use the shade is run up on the roller out of the way. As previously explained, the diffusing screen stands 6 ft. high by 4 ft. wide. It is covered with three rows of light tan-colored curtains, each row containing three sections. On the rear of the frame we have a similar set of black curtains, which may be employed to exclude and cut off light, while the light tan-color curtains are used for diffusing the light. The screen is built, as you will observe, so as to tip to any angle desired, thus enabling you to observe and control all the light falling upon the subject.
567. When using this screen with the Aristo Lamp, all curtains are drawn to the sides and the white diffusing shade only is drawn to the bottom of the frame. This screen is then placed between the light and subject.
Arranging The Light. The Aristo Lamp is attached to a rope which extends through a good sized pulley hung on a strong hook screwed into the ceiling. The hook should be placed between 3 and 4 feet from the side wall and by tying solid loops in the rope at different intervals, you can adjust the light to any height you desire. A strong hook should be screwed into the casing or wall over which you may slip the loop to hold the lamp in place. By placing the lamp the proper distance from the wall, it may be used for printing purposes as well. The printing cabinet may be placed directly under the lamp and the lamp then lowered into the cabinet when it is ready for printing.
Light Reflector. he light reflector is a very simple home-made contrivance, as you will observe by reference to Illustration No. 75, and consists of a 4-foot wooden hoop to which is attached a 30 x 40-in. white card. The hoop is placed around the outside of the center of the card and the card is tacked onto the hoop. Attached to the center of each side of the hoop is a cord, which extends to the top of the lamp. This cord simply runs over the top from one side with a half loop around the center post and down the other, both ends being attached to the hoop. The little grooves in the top plate of the lamp hold the cord in place, thus enabling you to place the reflector at any side angle. In order to balance the weight of the cardboard, a light weight is attached to the portion of the hoop opposite the cardboard.
570. For the directing of the light at any angle, another cord is attached to the hoop in the center of the cardboard. This cord extends over the top of the lamp, around one of the metal posts and back and then down. At the end of this cord is fastened a weight sufficient to hold the reflector in position. Should you want the light lowered, by simply pulling down on the weight slightly you raise the rear of the reflector, and to throw the light higher, by raising up on the weight the rear of the reflector drops to a more perpendicular position.
571. By reference to Illustration No. 75 you will observe the simplicity of the arrangement, yet it is an exceedingly practical application. The reflector is easily detached, but as the lamp may be raised higher to the ceiling when not in use, the reflector may remain attached to the lamp, when it is always ready for operation.