Oh noes teh sky is falling!

[kfbkfb]

http://www.blam1.com/discovision/DeadSideSubmission.htm
^^^
...a little elbow grease and rubbing alcohol would remove the coating...


I have used rubbing alcohol a few times to clean the outer edge of LaserDiscs if the glue squeezed out a little, I'm not very interested in (DiscoVision) dead sides.


Kirk Bayne

[Vilya]

Originally Posted by kfbkfb

http://www.blam1.com/discovision/DeadSideSubmission.htm
^^^
...a little elbow grease and rubbing alcohol would remove the coating...


I have used rubbing alcohol a few times to clean the outer edge of LaserDiscs if the glue squeezed out a little, I'm not very interested in (DiscoVision) dead sides.


Kirk Bayne

Laserdiscs were never made with polycarbonate. They used acrylic.

"The traditional 12- and 8-inch media are of acrylic construction." See section 5.2:

http://www.blam1.com/laserdisc/FAQ/FAQ_intro.htm

[kfbkfb]

I've actually never had to clean an optical disc with anything stronger than Walmart "Windex" (other than the glue situation I mentioned in my previous post), it has always worked (I never lend discs, I buy a few used discs from F.Y.E., Vintage Stock and lately some Goodwill stores via Amazon used CD sales).

The ones from Goodwill usually arrive w/broken jewel boxes and I always clean the CD w/"Windex" before playing, so far, they play flawlessly.


Any idea how a few of your optical discs became cloudy (I've never had that happen)?


Kirk Bayne

[slimjean]

..

[bhampton]

Since getting my new player, I check every disc before I play it. I really don't want to put a dirty disc in the player.

I'm finding warm water and dish soap followed by drying with soft cloth works. I purchased a bundle of microfiber towels at TJMaxx just for this.

If a disc fails at the layer change hot water can sometimes solve the issue if it's too late to get a replacement.

[Vilya]

Originally Posted by kfbkfb

I've actually never had to clean an optical disc with anything stronger than Walmart "Windex" (other than the glue situation I mentioned in my previous post), it has always worked (I never lend discs, I buy a few used discs from F.Y.E., Vintage Stock and lately some Goodwill stores via Amazon used CD sales).

The ones from Goodwill usually arrive w/broken jewel boxes and I always clean the CD w/"Windex" before playing, so far, they play flawlessly.

Any idea how a few of your optical discs became cloudy (I've never had that happen)?


Kirk Bayne

You might want to reconsider using an ammonia based cleaner, such as any "Windex" type of product, on your discs. Polycarbonate and ammonia are very incompatible having a "severe effect" when used together; see the chart at this link and scroll down to "ammonia."

https://www.calpaclab.com/polycarbon...ibility-chart/

The only common denominator that I could find with the few DVDs that developed this otherwise unremovable milky haze is that they all came in white plastic and/or translucent polypropylene disc cases. Now, that could be a coincidence, but it is the only thing in common that I could find.

Alcohol was the only thing that would remove this stubborn milky haze; the discs were entirely unplayable until I cleaned them in this manner. They continue to work long after having been so cleaned.

Many of us have been collecting discs for a very long time and we have amassed sizable libraries. Along the way, we have learned what works for us when cleaning a disc. I use alcohol only when other methods fail. Rely upon your experience. What is certain is that no one would deliberately keep doing something that harmed their collection.

[kfbkfb]

Originally Posted by Vilya

You might want to reconsider using an ammonia based cleaner, such as any "Windex" type of product, on your discs. Polycarbonate and ammonia are very incompatible having a "severe effect" when used together; see the chart at this link and scroll down to "ammonia."

https://www.calpaclab.com/polycarbon...ibility-chart/

Thanks, I'll stop using "Windex" on my optical discs.


Kirk Bayne

[slimjean]

Originally Posted by bhampton

Since getting my new player, I check every disc before I play it. I really don't want to put a dirty disc in the player.

I'm finding warm water and dish soap followed by drying with soft cloth works. I purchased a bundle of microfiber towels at TJMaxx just for this.

If a disc fails at the layer change hot water can sometimes solve the issue if it's too late to get a replacement.

Soap is a much better method because of the hydrophilc properties. The design is to surround the contamination with carbons to wash away the issue.

Alcohol with plastic can have dehydration and substitution issues because of the unreliable chemical makeup.

Not that one should use a a heavy duty detergent. High grade soap that is water based without particles is a much more intelligent option.

70% alcohol over the counter is straight up assinine.

[Vilya]

Originally Posted by slimjean

Soap is a much better method because of the hydrophilc properties. The design is to surround the contamination with carbons to wash away the issue.

Alcohol with plastic can have dehydration and substitution issues because of the unreliable chemical makeup.

Not that one should use a a heavy duty detergent. High grade soap that is water based without particles is a much more intelligent option.

70% alcohol over the counter is straight up assinine.

Isopropyl alcohol often works where soap and water fail. Needlessly losing a disc because of an unwillingness to try other perfectly safe cleaning methods is just plain dumb.

[slimjean]

Originally Posted by Vilya

Pretending to be a chemist, now, that's straight up asinine (correct spelling).

I was never pretending. I am a chemist. I don't lie.

I also don't have to prove anything to you. My work is easily found and I keep that part of life private. I always have. Anyone that has held a security clearance should know this concept.

My criticism wasn't in regard to exceptions it was in regards to using it as a method.

Over the counter isopropanol is unreliable.

The rest is you just acting like a baby because someone dare says something that goes against your belief.

The scientific facts are there and you choose to ignore the reasoning. This is the way for many members.

Now come off of it. I say it is assinine to use 70% over the counter alcohol. I stand by that. There is no reason to attack my career/credentials/personal worth because you have a bruised ego.

[Vilya]

If you were a chemist, you could provide your credentials, such as what degrees you have earned and from where. This information is not some classified military secret.

It's not that you don't have to prove anything; it is that you will not do it. Every professional that I have worked with has always been happy, proud even, to share that information. People who can not prove their claims ALWAYS retreat to the "I don't have to prove anything!" mantra.

Consumer grade Isopropyl alcohol is entirely reliable. Unreliable products fail in the marketplace. A product does not have to be 100% "pure" to be safe, effective, and reliable. Even medical grade isopropyl alcohol is not "pure."

If you are a chemist describe this chemical reaction as a chemist would: CH3CHOHCH3 + C15H16O2 (the numbers should be subscripts, naturally.) I'll ask my friend, an actual organic chemist with a Ph.D, to grade your work.

I can't "attack" your credentials because you won't tell anyone what they are. My id, ego, and super ego are doing just fine.

Asinine, for the second time, is spelled with one "s"; professional scientists usually learn more quickly. Throwing away a disc needlessly because of an obstinate refusal to try other safe cleaning methods is truly asinine.

I use the cleaning methods that I have described because they work. I am not some masochist looking to slowly destroy my collection nor am I some sadist looking to destroy anyone else's.

How about you advocate what works for you and allow others to do the same?

[slimjean]

[slimjean]

Originally Posted by Vilya

This information is not some classified military secret.

And you know this how? For someone in the military you seem pretty ignorant on what could and could not be possible.

Look at this whole post? Would you reveal private information to someone such as yourself?

How hard is it to show a drivers license and show the universities with state and federal jobs as well? Why would I? You aren't exactly acting rationale. For some people it is a matter of safety.

Googling a few facts does not make you an expert, but coming unhinged over this is really unnecessary.

I have done nothing to deserve to get the boot. I stated that your method is not a good practice and it comes from my knowledge based on my many years of industrial work as a chemist.

This has left you so butthurt that you literally have edited a thousand times. I get it, you discovered a mutagen and you want the world to know.

Relax. You have been rubbing away so much, you truly are letting it go to your mind.

You act as if someone came to your house and siezed your solvent supplies.

You can have last word (and I know you will). Just know that whatever you say, just take your time. Your keyboard warrior badge is in no danger. I have no fight with you.

P.S. Chemists are not known for being great spellers. Maybe it is a learning disability. I have messed up "professional" my whole life. Must mean it is impossible to be a formulation chemist huh?

[Vilya]

Originally Posted by slimjean

And you know this how? For someone in the military you seem pretty ignorant on what could and could not be possible.

I know this because I served in the military and I know others who did the same, both active duty and civilian Department of Defense employees alike.

The work is often classified, but not the resumes of the people doing the work. Educational backgrounds are not state secrets.

Originally Posted by slimjean

Look at this whole post? Would you reveal private information to someone such as yourself?

Telling us that you have degree "X" in field "Y" from university "Z" will not lead anyone to your doorstep. Paranoid much?

I told you about my friend's credentials; have you been able to track her down yet?

The work one does for the military may well be classified, but your education background is not. You have included it with every resume that you ever sent out.

[Vilya]

Originally Posted by slimjean

I have done nothing to deserve to get the boot. I stated that your method is not a good practice and it comes from my knowledge based on my many years of industrial work as a chemist.

Because it is a better practice to just give up and throw the disc away rather than to do everything possible to save it? For the umpteenth time, polycarbonate has excellent compatibility with isopropyl alcohol...even that dangerous contaminate filled consumer grade stuff that we all have in our medicine cabinet.

A moderator stated the following:

""The moderators want to remind members that this thread is meant to be an arena for public discussion, focusing primarily on the subject of the thread. It is not meant to be a personal chat room between two members who leave no room for anyone else, post anything they want, engage in non-stop self-promotion, soapboxing, or whatever you want to call it. This thread will remain closed at the discretion of the moderators. It is strongly suggested the two members take their conversations to the Personal Pages section or create an invitation-only private Social Group."

https://forum.blu-ray.com/showpost.p...ostcount=16219

Originally Posted by slimjean

P.S. Chemists are not known for being great spellers. Maybe it is a learning disability.

The ones that I know are pretty damn smart and while they may not all be great spellers, they are great learners. They do not need to be corrected repeatedly. They would never confuse polypropylene with polycarbonate, either.

[FrankLeone86]

You guys are nerds… I’m embarrassed reading this post. Grow up & enjoy physical media!

[Vilya]

Originally Posted by FrankLeone86

You guys are nerds… I’m embarrassed reading this post. Grow up & enjoy physical media!

You're embarrassed? Trying being half responsible for this train wreck of a conversation.

Great advice about enjoying physical media, but growing up is overrated.

[jess1581]

I went to kemikal skool!

[Vilya]

Originally Posted by jess1581

I went to kemikal skool!

[Show spoiler]

Great! Thanks for sharing!

Now I can track you down and hunt you for sport.

[jess1581]

Originally Posted by Vilya

Great! Thanks for sharing!

Now I can track you down and hunt you for sport.