Based on some of my reading, which is by no means definitive, we may be speaking at cross-purposes. From what I gather, various fatty acids are used in the PVC compound used to make vinyl records. These serve to help control the mixture and the point at which the ingredients melt, i.e. thermal stability. In this, they are sometimes referred to as "lubricants" but not in the sense that we might commonly think of a lubricant. At the same time, to add to the confusion, these materials can also be used as a 'release agent' in molding. Such materials, which include stearic acid, can apparently migrate to the surface- this is, I think, what people are referring to when they talk about the need to clean off "mold release agent." So, there may in fact be artifacts from manufacture that need to be cleaned off of the surface of a new record. And, if you read some of the messaging from the cleaning fluid folks, they talk about removing the bad stuff, but not doing damage to plastics or their properties; in this sense I think the term "lubricant" is used in a more common form. But, is that stuff really there to "lubricate" the surface or as part of the chemical composition of the compound to make manufacture more consistent? (And, to what degree is there any consideration given to the ease with which the just pressed record can be removed from the stampers?). Perhaps I'm just restating the question, but you see how these terms can be used, e.g. "lubricant" in different contexts.
I'm not sure if you asked a materials scientist if he or she is including a "mold release agent" in the vinyl compound, they would consider this the primary purpose of adding this material to the mix. So, the folks selling fluids may be correct, and the folks involved in making the vinyl compound and pressing the records may also be correct. I'm not a plastics scientist, I am just reading papers, patents and trying to work my way through a practical understanding of how all this adds up. That's my reading at this point in time, which could change, based on further information. But, it is consistent with everything I've learned, and somewhat conveniently, also reconciles the different views on the subject.
Glad to be corrected.
I'm not sure if you asked a materials scientist if he or she is including a "mold release agent" in the vinyl compound, they would consider this the primary purpose of adding this material to the mix. So, the folks selling fluids may be correct, and the folks involved in making the vinyl compound and pressing the records may also be correct. I'm not a plastics scientist, I am just reading papers, patents and trying to work my way through a practical understanding of how all this adds up. That's my reading at this point in time, which could change, based on further information. But, it is consistent with everything I've learned, and somewhat conveniently, also reconciles the different views on the subject.
Glad to be corrected.