"Old Lacquers" are uncut lacquers that were manufactured sometime in the not-recent past. Boxes of these are often discovered with lathes and in estates, and can often be purchased on ebay. They come in a variety of types, sizes, etc, but are a relatively risky gamble. The nitrocellulose compund is often dried out or cracked and oxidized, making them unusable. However, some boxes (most often unopened and still sealed) of 50+ year old aluminum-core lacquers have been found and used with great results.
There were many different manufacturers of "old lacquers" during the heyday of home recording. Wilcox-Gay, Presto, National, etc all made recording blanks. During WWII, many blanks had either a cardboard or glass core, while post-war lacquers often had aluminum bases.
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