ADJUSTMENTS AND MAINTENANCE.— Normally, when the machine is first installed, no adjustments  are  required.  Occasionally,  however, some readjustment may be necessary because of atmospheric  changes,  which  may  cause  shrinkage or   expansion   of   some   of   the   belts.   These adjustments  should  be  performed  according  to  the manufacturer’s  instructions  and  only  then  by qualified  personnel. Maintenance  is  required  on  a  daily,  weekly, monthly, semiannually, annually, and whenever necessary  basis.  The  following  guide  should  be followed: 1.  Daily  requirements: a. Empty the residue bottle after at least every 8 hours of operation. Never reuse residue water. b.  Replenish  the  ammonia  supply. c.  Clean  the  outside  of  the  cylinder  with glass  cleaner.  (Operate  the  machine  at  slow  speed while cleaning the cylinder. ) d.  Clean  the  feedboard,  tracing  receiving tray, and print receiving tray. Keep them free of foreign   objects. 2.  Weekly  requirements: Clean the inside of the cylinder when the machine is COLD, using the following procedure: a. Open the door at each end of the lamp housing. b.  Remove  the  lamp  connector  from  each end. c.  Swing  the  triangular  stop  aside  and withdraw the lamp assembly. d. Clean the inside of the cylinder—wrap a damp, clean cloth around a swab and wipe the cylinder  while  it  is  in  slow  motion.  Repeat  the procedure with a dry cloth wrapped around the swab  until  the  cylinder  is  thoroughly  clean. e. Wipe the lamp assembly with a DAMP cloth. f.  Reinstall  the  lamp  assembly. IMPORTANT: Handle the lamp assembly with great care, as it is fragile and expensive. DO NOT  ATTEMPT  TO  REMOVE  THE  LAMP FROM   THE   MACHINE   UNTIL   IT   HAS COOLED. Always rest the lamp assembly flat on a table; never stand it on end. 3.  Monthly  requirements: Lubricate  the  bearings  and  drive  chain assembly  sparingly  with  No.  10  motor  oil. 4.  Semiannual  requirements: Clean  all  suction  holes  of  the  rotating tracing  separation  drum  with  pipe  stem  cleaners. 5.  Annual  requirements: a. Lubricate the bearings and drive chain sparingly  with  No.  10  motor  oil. b. Remove all hoses of the airflow system and  clean  out  dust  and  dirt. 6.  Whenever  necessary: a. If the developer sealing sleeve becomes tacky, remove it from the machine; wash both the inside and the outside thoroughly with soap and water and dry well. NEVER attempt to wash the sealing sleeve while it is in the machine. b.  It  is  advisable  to  clean  the  perforated side  of  the  developing  tank  at  the  same  time. Use  any  commercial  cleaning  fluid.  This  will prevent  any  smudging  of  prints  because  of  dirt accumulations  on  the  perforated  side. REPRODUCTION   MATERIALS Diazo  materials  are  available  from  various sources  under  different  trade  names  and  desig- nations, such as K&E, 3M, and GAF. Basically, all   diazo   reproduction   materials   have   been coated with a light-sensitive dye. The two types commonly   used   for   reproduction   of   original drawings are standard weight blueprint paper and sepia line intermediates. Blueprint  Paper Standard  weight  paper  (commonly  called blueprint paper) provides a black or blue image on  a  white  background.  The  printing  speed  for paper is described as rapid. Paper is available in sheet sizes that range from 8 by 10 in. to 34 by 44  in.,  or  in  rolls  that  range  in  widths  from  11 to  42  in.  with  lengths  of  50  or  100  yd. Colored paper provides black or blue images on  blue,  green,  pink,  or  yellow  stock. Plastic-coated papers are now available that give  a  slightly  glossy  print  with  better  line density than the standard paper. Sepia  Line  Intermediates Sepia  line  intermediates  are  used  as  duplicate originals.  These  intermediates  are  prints  from which  additional  prints  can  be  made,  saving  wear on  the  original.  When  you  use  the  sepia  inter- mediate,  it  is  possible  to  keep  emulsion-to- emulsion contact in each generation, resulting in a sharper image. In addition, sepia has a greater density  and  is  capable  of  delivering  a  darker 3-50