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.

[EToTheE]

They seem tolerant of heat. Inadvertently had my Warner Bros 50 Film Collection up against my Nintendo Wii for 8-12 months. Realized the other day, took out a few discs to check, and they were HOT, well over 100 degrees F. After a brief panic I tested a few and they still play fine.

[MrJules]

Thanks for your qualified reply.

[MrJules]

Anyone else?
I'd really appreciate your help.

[singhcr]

Hi there,

I can't find anything about a max temperature, but here are the suggested temps:

http://en.wikipedia.org/wiki/Optical_media_preservation

Issues which affect data longevity of nominally archival-grade discs include the following: dye failure (discs with premium organic and pthalocyanine-based long-life dyes are more suitable); bonding failure (premium bonding agents and edge-to-edge coverage improve longevity); scratches,minimised by careful handling and a scratch-resistant coating; production quality (some factories have better quality control standards, and discs from a batch known to be good may be more reliable than another batch).[4] Testing is required since conditions vary from machine to machine and from disc to disc; environmental control is required to prevent damaging conditions. When these conditions are met it is believed that the life of an archival-quality CD-R or DVD-R can be as long as 100 years, compared to the typical five to ten years for non-archival quality optical discs. The ISO 9660 standard specifies a stable room temperature of 18 - 23 °C with relative humidity of 30% to 50%.[5] Keeping multiple copies of discs is necessary for added protection. “One Master, stored under optimal conditions, one Working copy to be used for access purposes or copying, and one Safety copy to be stored at a different location.”[6] According to the Institute of Conservation the container most suitable for storage is a rigid high-quality case made from inert polyester placed vertically.[7]

Basically, room temperature (~75 F) with a decent relative humidity is ideal. As for extremes, I think as long as you don't leave your discs in the back of your car on a sunny day you'll be fine.

[Spooked]

Has anyone had issues with Blu-rays mailed during high-temperature weather? I'm asking because I have some OOP Blu-rays arriving over the next couple of days and its supposed to hit 98 degrees F. Our mail doesn't come until late in the day, so I was kind of starting to stress out a bit.

(It seemed better to tack my question on to this post rather than start a new thread.)

[handcraftedbits]

Originally Posted by Spooked

Has anyone had issues with Blu-rays mailed during high-temperature weather? I'm asking because I have some OOP Blu-rays arriving over the next couple of days and its supposed to hit 98 degrees F. Our mail doesn't come until late in the day, so I was kind of starting to stress out a bit.

(It seemed better to tack my question on to this post rather than start a new thread.)

I wouldn't sweat it. Anecdote time, I used to have a couple boxes of DVDs that lived in my attic for years and every single one of them ripped perfectly (and this is in the southeast). A couple hours in relatively cooler weather? No big deal I would imagine.