Question about a mark on the back of some bluray disc?

[Bobo1313]

When checking the back of a bluray disc under direct light have you ever noticed that some of them have like a tiny dot/dots on random spots of the disc? They're almost like a speck of dust but they won't come off. Do guys have any idea of what they are?

[Thomas Irwin]

I suspect they may be tiny air bubbles in the plastic or protective coating. I've noticed them on a few occasions.
I had some Blu-ray discs years back that had fingerprints on them. I used a terrycloth type of microfiber cloth to clean the discs. It left a bunch of adhered fibers that I could not wipe off for some reason. I was forced to rinse them under cool water to remove the fibers. After patting up the remaining water and letting them air dry, I noticed much such minute speckling over much of the discs surfaces, but to this day, it has never affected their playback in any way.
Beyond that, I wouldn't really know.

[Member-496106]

Originally Posted by Bobo1313

When checking the back of a bluray disc under direct light have you ever noticed that some of them have like a tiny dot/dots on random spots of the disc? They're almost like a speck of dust but they won't come off. Do guys have any idea of what they are?

Can you post a picture of it?

[Bobo1313]

I tried, but the discs are so reflective, my camera can't handle it. The best I can describe, it looks like a speck of dust that can't come off.

Years ago I thought they were just a pit that was visible. I'm sure some of your disc have them, I've seen them from all companies blurays. I'm not trying to worry anyone, they seem to have no affect on playback. It was more so a question out of curiosity.

[johndoyle123]

Usually a replication bubble from production, rarely rot related with Blu Ray