Why is there a gold trim around the edge of the record?

[JAR]

From a weekend estate sale.
Why is there a gold trim around the edge of the record?

JAR

record moline1.jpg (49.17 KiB) Viewed 1972 times

record moline 2.jpg (43.46 KiB) Viewed 1972 times

[Roaring20s]

The examples most commonly encountered today are 10, 12 or 14 inches in diameter and consist of an aluminum, cardboard or a glass core disc coated with black nitrocellulose lacquer.

The supplied photo is not clear to me.
Perhaps the lacquer has tinted the edge to look gold.
Scrape the edge with a razor blade to see if the color changes to silver.

James.

[Roaring20s]

I thought of something else. You may not own this and just saw it listed somewhere.
If this was photographed close to incandescent lighting, silver will have a yellow or golden look to it.
I see this on eBay often, the seller says they are selling a silver Exhibition reproducer and it looks like a gold one.

James.

[Retrograde]

Its one of those "home" recording type record. Soft recording surface applied to a metalic core. Nothing unusual. Ive seen these peeliing apart.

[edisonphonoworks]

This looks though as it was recorded on a decent Presto, Rek-O-Kut or other semi or professional recording lathe due to the eccentric groove. All modern records, since the 1950s start off as these lacquers, either directly cut on a record lathe, hooked to an amplifier that drives the cutting head, and then to an equalizer, compressor, then to the mixing console and microphones, or from a source such as reel to reel tape as the master. This is most likely direct on-location recording. Most of the semi-pro recorders had a frequency response of 70-10,000 cps, while high-end recording heads like Westrex, Grampian, Neumann can go 30-15,000 cps, or even 16- 25,000 cps. These aluminum discs coated with nitrocellulose lacquer are then sprayed with stannous chloride and sliver. After the master disc is coated with the silver spray, it is nickel-plated to make the master, this is plated to make a mother and the mother plated to make the stamper for stamping out the records. (I am sure many on this group know this but the beginner of record making may not.)