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Hi Richard and Frank:

Richard - thanks for being considerate in trying to clarify so others 
were not confused. My comments were before Frank clarified if the PVC 
was on both sides on the envelope or just on one side (top side). I was 
not implying to consider resurfacing the top layer of a CD to remove the 
PVC layer. I meant that I didn't recommend resurfacing the bottom side 
to remove PVC if the sleeve happened to be PVC on both sides or the 
disks were stored with the data layer against the PVC.

The RTI machines are designed to mill down existing layers of a CD or 
DVD disk surface to remove surface scratches and blemishes of the 
existing data side of the disk, not to remove foreign particles or 
matter, or to mill down the topside of a disk. My experience with these 
machines, foreign particles clog the sanding pads as the disk is being 
resurfaced and further gouge the disk surface.

Haze or other air contaminates can be removed without issue as they have 
no mass. At one time, I received a large collection of CD's from an 
office, where the CD's were stored in a jukebox type player in the same 
room where the carpeting had been replaced. The new carpet out-gasses 
contaminated the CD's with a haze that made them unplayable. The haze 
was easily removed from the bottom data layer of the CD's with the RTI 
machine in the least aggressive polish mode.

If a blown heat or hot water source cannot remove the PVC on the top 
side of a disk, I recommend trying to carefully trim the outer edge and 
middle hole of the disk (if the PVC is welded securely on the top 
portion of the disk) and seeing if it will play so you can remove the 
data from the disk. Balance is KEY here and if the disk is even slightly 
out of balance from the addition of the PVC layer, either the disk or 
the drive can suffer catastrophic damage. So only try this with a disk 
you are willing to loose in a drive you are willing to loose.

Frank, please let me know how you make out.

Kind Regards,

John Schroth

MTS



On 12/9/2016 5:49 PM, Richard L. Hess wrote:
> Hi, John, and Frank,
>
> In reading the two paragraphs quoted below, there is some ambiguity 
> that the resurfacing machine might be used on the label side. That is 
> not possible, is it? I don't think on a single-layer CD that can be 
> done. Since I was confused slightly, I thought I'd mention it publicly 
> in case anyone else might be.
>
> The confusion stems from Frank saying the PVC is only on the label 
> side and then John saying not to use it for removing large foreign 
> objects like a PVC layer.
>
> Cheers,
>
> Richard
>
>
>
>
> On 12/9/2016 12:38, John Schroth wrote in part:
>> Hi Frank:
>>
>> > I would not buy the resurfacing machine to remove large foreign 
>> objects
>> such as a PVC layer from the disks. It could be used to resurface a disk
>> that has had minor to major surface damage to the disk while removing
>> the PVC layer from the disk. It can remove scratches that are
>> surprisingly severe (unless they've gone straight through the protective
>> layer) without damaging the disk. I've also seen a haze built up on
>> disks over the years and the machine is great for general cleaning and
>> removing haze.
>>
>>
>>
>> On 12/9/2016 12:02 PM, Frank Ferko wrote in part:
>>> Hi, John,
>>>
>>> Our sleeves have PVC on only one side with cloth on the other side, so
>>> the side with printing is the only side that is sticking.