Blu-ray heat resistance

[MrJules]

Hi,

i hope someone can help me with this.

I'd like to know what temperatures blu-rays can take before the disc/data layer gets damaged.

Recently I examined some discs for scratches under a quite strong light bulb. And after doing that I wondered if it could have damaged the discs/data layer. I measured the temperature there and got values ranging from 32 to 42 degrees celsius (depending on how close I held the disc to the light and how long). The ambient temperature was about 22 degrees.

Are there any official specifications or studies about the heat resistence of a "commercial" blu-ray disc?
I heard once that they are more heat resistant than DVDs. But I'm not sure if that is true.

I guess the light doesn't matter as long as it's not direct sunlight / uv rays?
But I'm a little concerned about the heat.


Thanks in advance.