The truth behind recycled vinyl records: When the disc groove speaks instead of the advertising words

In the context of the explosion of the hobby of vinyl records, waste from inventory discs has become a painful problem for record labels. While marketing campaigns promise that recycled materials still guarantee original sound quality, a recent blind test at Abbey Road Studios revealed a much more complex reality. 1. Static grooves and noises that cannot be hidden

Warner Music Group (WMG) and record pressing plant GZ Media conducted an experiment: melting 10,000 inventory vinyl records to press new ones. They created 6 versions with different mixing ratios of recycled plastic (from 10% to 100%) along with a control version using 100% new plastic. A testing team of seven experts at Abbey Road Studios listened to all samples blindly. The results showed that the version using 100% recycled materials ranked lowest. All noted increased background noise, accompanied by continuous clicking sounds.

Recycled plastic may be harmless with noisy Pop/Rock albums, but with delicate recordings that require absolute background quiet, these disc tracks will immediately reveal their shortcomings. 2. The test does not reflect actual production

At first glance, the version mixed with 25% recycled plastic scored even higher than the new PVC disc. However, this uniformity only exists in a laboratory environment. From an initial inventory of 10,000 discs, the project had to discard all color discs, 7-inch discs, 10-inch discs and discs manufactured before the European law banning lead-containing stabilizers. In the end, there were only 3 black disc titles left that qualified to be put into the crusher.

In the real world, inventory is a decades-long mess, coming from dozens of factories with completely different chemical mixes and stabilizers. Melting a heterogeneous plastic mixture always leads to uncontrollable sonic results. History has proven this since the 70s, when factories reused old discs to save costs, creating editions that were noisy and full of bumps.

The test report also revealed two major gaps in objectivity:

4. "Recycling" on paper

The biggest problem lies in how record labels plan to operate the production line. The report recommends using volume compensation at the plant level.