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This will take you to information and photos of early RCA Pregrooved Discs This will take you to information and photos of Thin Plastic Discs This will take you to information and photos of Lacquer (acetate) Discs You are here, you will find information about Discs in this section This will take you to information and photos of Radio Transcriptions This will take you to information and photos of Cardboard Discs This will take you to information and photos of Uncoated Aluminum Discs BLUEBAR
         Old Recordings    Discs    Tapes    Wires    Dictation Belts    Other Media

Record Types
Commercial phonograph records were, and still are stamped into shellac or vinyl by metal dies.

Instantaneous discs were cut on a recording lathe, often quite simplified, and could be played back immediately without the need for any processing. A variety of surfaces were used which had to be soft enough to be cut or embossed, hard enough to withstand a reasonable number of careful playings without breaking down. A variety of playing speeds, disc diameters and groove widths were used as the technology evolved. Radio programs were documented in this way as were baby's first words.

Here are the basic surfaces:

Uncoated aluminum disc Lacquer coated disc Thin plastic disc Cardboard disc
Aluminum       Lacquer                Thin plastic         Cardboard

Only during the LP era were stylus pressures light enough to be expressed in grams rather than ounces. Groove damage from heavy tone arms, repeated playings and worn or improper needles is not unusual. I select the stylus most appropriate to the groove's present condition from an assortment of over 30 sizes and shapes.

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smolians@erols.com         Phone:301-694-5134

This site 2001 Steven Smolian rev 1