Cylinder / 2-minute / moulded hard wax（moulded／Gold-Moulded）

Cylinder / 2-minute / molded hard wax（moulded／Gold-Moulded）

Image source: Wikimedia Commons (Public domain)

"Cylinder / 2-minute / molded hard wax" is a typical format for 2-minute cylinders, which are not cut directly into the wax surface, but are instead molded using a mold made from a master to replicate the product. This mass production method, known as "Gold-Moulded" by the Edison group, was put into practical use in the early 1900s, and solved the structural weakness of brown wax and cut cylinders, which made it difficult to mass-produce the same content, by revamping the mass production process itself.

The material is generally described as a black "hard wax." While the 2-minute standard itself has been retained, the increased uniformity of duplication and supply capacity has made it a medium that has made the distribution of commercial recordings (entertainment content) more like an industrial product. Edison-style Gold-Moulded discs are often described as having a playback speed of 160 rpm, so it is important to note in practice that this should not be confused with the conventional 2-minute discs (approximately 120 rpm/approximately 144 rpm).

Features

The key point of this format is that it can be reproduced by molding. In the days of brown wax and cut, it was difficult to avoid recording the same program multiple times or recording simultaneously on multiple devices, which limited supply. Molded hard wax marks a major turning point in that it makes it easier to repeatedly produce the same content with the same quality by using a master and mold.

Furthermore, many of them were distributed as hard wax (hardened wax), and their color shifted to black or dark brown. As a result, they became more standardized and marketable as records for sale, making them a suitable medium for catalog distribution.

Columbia Records Ad 1904 Munseys Magazine

Image source: Wikimedia Commons (Public domain)

Identification points (appearance and display)

The first impression of the appearance is that it is darker, glossier, and slightly harder (brittle) than brown wax. However, due to differences in age, storage conditions, and production lots, it is difficult to judge by color alone, so we must also look at the outer box, tube, and any printing or engraving.

Two Edison cylinder records and their cylindrical cardboard boxes (from a 1910 catalogue)

Image source: Wikimedia Commons (Public domain (US))

For Edison records, the "Gold-Moulded" designation (on the tube or packaging) and series designation are good clues, and for molded records from other companies like Columbia, the designation in advertising and catalogs (e.g., "molded") and information on the container can be useful for identification. Many records do not have permanent labels on the disc, so if the recorded announcement at the beginning of the recording remains, this is the quickest route to identifying the contents.

The concept of manufacturing and replication (the core of molded/Gold Moulded)

The concept behind the molded method is simple: the groove shape of the master is transferred to a "mold" using a metallurgical process, and then wax is molded from that mold to replicate the same content. The process, known as Gold Molded, is often explained as the idea of metallizing (making conductive) the master surface before it is subjected to the electroforming process. Gold-Moulded is often explained as a reference to the gold electrodes used in mass production, and is a name that refers to the manufacturing process rather than to its "luxury" nature. The key point is that a "mold" is created from the master, and the same content can be repeatedly molded from it.

As a result, unlike the cut method, recording is no longer the same as creating an individual product, and recording (master) and duplication (product) are separate processes. This has boosted supply, uniformity, and catalog expansion.

Image credit: Wikimedia Commons (CC BY-SA 3.0) / Author: Edisonphonoworks (Shawn Borri)

Limitations of this format

Although it has become more suitable for mass production, as the medium is "wax-based," it remains vulnerable to heat, impact, and inappropriate stylus pressure. Hard wax is often said to be more wear-resistant than soft wax, but the risk of dropping, chipping, and cracking remains a real problem, and careful handling is a prerequisite for existing materials.

Also, because the standard is limited to 2 minutes, it is not ideal for longer-length presentations. The subsequent growth of 4-minute and celluloid formats is undoubtedly due to the need for longer recording times and durability.

Improvements to this format (next format)

“There are two main directions for improvement: extending the recording time and making the material even more durable. Attempts to go beyond the 2-minute limit lead to the 4-minute system, while measures to address the weaknesses of wax (chipping, deformation, and wear) lead to celluloid-based systems (e.g., Blue Amberol).

Furthermore, looking at the market as a whole, as disc records became the main battlefield at the same time, cylinder recordings simultaneously matured as an industrial product and declined as a method. Among these, molded hard wax represented the stage at which cylinder recordings became most like mass-produced media.

Preservation and handling (attention to detail in collection practices)

As with brown wax, handle it by supporting the edges without touching the grooves, and avoid sudden changes in temperature and humidity and direct sunlight. Store it upright to maintain a clean environment that prevents dust and mold. When playing, it's important to use the right needle, proper needle pressure, and a stable rotation speed; playing too hard increases the risk of damaging the grooves.

Proper way to hold a phonograph cylinder (c. 1900)

Image source: Wikimedia Commons (Public domain (US))

If you are treating them as documents, the policy of "minimizing the number of times they are played and replacing access with digitization" will ultimately protect their preservation. When playing them, it is important to use a compatible stylus and appropriate stylus pressure, as well as operate them stably at a rotation speed that meets the specifications; playing them too fast increases the risk of damaging the grooves. For Edison-style gold-molded records, 160 rpm is often cited as a "New High Speed," and it is important not to confuse it with the conventional 2-minute (approximately 120 rpm/approximately 144 rpm).

The historical significance of this format

Molded hard wax (Gold Molded series) represents the stage when cylindrical recordings reached the perfection stage as a "duplicable product." The separation of recording (master) and production (duplicate) not only increased supply, but also promoted consistency of content and market expansion (cataloging).

In that sense, this format can be said to mark the transition from the "19th century performance recording culture" to the "20th century reproduction media industry" as a physical medium.

TOP