Grading standard
CODEDVINYLS assesses records on the basis of the international Goldmine Grading standard, also using the Excellent (EX) grade from the European Record Collector grading standard. This page explains the standards by which we assess records and assign grades.
This page is an English translation to help you read the Korean original. For any contract, the Korean original is binding and prevails where the two differ. Korean original →
Translation errors can be reported to gm@codedvinyls.com.
Assessment standards and methods
Every disc is lightly cleaned with a DIY cleaning solution (95% 3x-purified water, 5% isopropyl alcohol) sprayed onto a seamless microfiber cloth. It then goes through a visual inspection by default, and a sound check when needed.
1-1. Visual assessment (eye-grading)
We identify a record's physical defects to predict their effect on sound quality.
A. Identifying scratches and breakage
- Surface marks — shallow marks on the surface. Fingernail scratches fall into this group, and they do not greatly affect playback.
- Hairlines — very thin fine lines. They can occur from sliding the record in and out, and their effect on playback is minimal.
- Scratch — viewed at an angle under natural white light (approx. 3500–4000K), it does not reflect light properly, and it can usually be felt with a fingertip. It causes a 'tick' sound or, in severe cases, a skip.
- Cartridge scratch — a scratch formed along the groove when anti-skating control has gone wrong. It is more serious than an ordinary scratch across the tracks and causes skips 100% of the time.
- Groove deformation from gouges or breakage — when gouges or breakage deform the groove, the stylus cannot get past it and the record cannot be played.
B. Distinguishing pressing defects
- Warping — the record is bent out of flat. The tonearm moves up and down heavily, and in severe cases it causes skips.
- Off-center — the spindle hole is out of line with the center, causing pitch instability such as wow and flutter.
- Non-fill / stitch — a defect in which the groove is not completely filled. It shows as silver dots or lines and produces a hissing noise.
- Bubbles / pimples — small bumps and bubbles on the surface. They cause pop and click noises as the stylus passes over them.
1-2. Sound check standards and setup
A sound check is always carried out on discs in poor visual condition, discs that have lost their gloss, and discs with visible surface migration (stains, ripple marks).
Cartridge · Ortofon 2M Black (tracking force 1.5g)
Amplifier & speakers · Pro-Ject MaiA S3 / Speaker Box 3E
Cartridge · Nagaoka MP-500
Amplifier & speakers · Rega Elicit MK5 / KEF Q15.2
Ultrasonic cleaning — limited use
Given the physical properties of PVC, ultrasonic cleaning is carried out only in very limited cases. It is limited to cases where, after long storage, antistatic agents and contaminants from the inner sleeve have become fixed to the surface and we judge that ordinary dry and wet cleaning alone cannot make the record playable. This is because excessive ultrasonic vibration can cause microplastics to come away from the surface, with the risk of damaging the record's distinctive tone and texture.
Vinyl grading assesses appearance + playback quality together. A record can receive a low grade for pressing defects or groove wear even if its appearance looks clean; conversely, a record whose appearance shows signs of use can be assessed at a higher grade if its playback quality is excellent.