Show jt H r I k Record Making Makin g Delicate 1 11 Work Gold Ph Plated Plate ted d f Heat is necessary to record makIng maki mak mak- i i Ing fins but never afterward A disk i starts with a round metal plate one one- I I ha hall half inch thick and slightly larger large r I il than the record will be when finh fin fin- 1 h fished It is heated and a thin layer layt lay lay- t Ii er of wax flows on to be cooled carefully carefully care enre- 1 fully and passed on to the recording g room The sound picked up by ml microphones microphones mi mi- elec and converted into electrical elec elec- energy by amplifiers piped pipe d into the room is changed back into j mechanical energy and impressed on the thin layer of wax by the cutting head The waxed plate 1 is isI s I put on a machine under a vacuum m t and the recorded surface e is covered d with a very thin layer of gold It is now a metal plate with a layer laye r rd of wax containing music cuts an and d the surface is gold plated It is pu put tr t into a sulphate copper-sulphate solution for fo r 16 hours lieu and a heavy copper plate put over the gold This plate copper e is lifted a away way from the wax and the th e N inside surface is gold with an opposite opposite opposite I site impression of music The dis disI disk k I is nickle plated then chrome plated plate d sj to make the i grooves more rugged 11 It now is ready to be put on a press I i Then the label is set in the cenI center cen con I ter tel the mass of the formula is pu put t f on the disk and it is heated to 30 0 I. I degrees The press is closed by I hand and opened immediately The Th Thi e i f finished record then is ready to play t But before it is played on your you r J phonograph brush of off the carbon carbo rn n 1 dust with a velvet buffer bufTer or a soft sott t 1 hair Imir brush like you use on your for fat tt t hatI hat I |