Stock shellac pressing

Stock shellac pressings are those produced from a shellac and filler mix (the fillers were put in to both increase the resistance to wear and to keep the price down - shellac was and is expensive!). Because of the quantity of filler used, stock shellac surfaces tend to be noisy and prone to grittiness, e.g. Victor, Brunswick, Vocalion, Decca etc. Most records pressed in the US, Europe and Britain were stock shellac.