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Reading comprehension is always a difficulty when threads on a forum extend tail-male to some length like this one. Regarding "PELS" it would be foolish to press the safe limits of exposure to any material. Safety in the studio demands adequate ventilation it's that simple. Painting in oils just plainly does not require using an amount that would even begin to approach PEL, with the solvents commonly available for use.
A major "problem" with statements about "turpentine" (and other materials) is what I outlined earlier. While most materials are identified by a generic name, invariably one encounters a widely varying range of quality and composition dependent on origin and process. Rather as one can generically identify an "automobile" . . . no one expects a Chevy Geo to have features identical to a Ferrari, nor would they expect to pay the same for either. The same range of possible qualities and permutations obtain whether one is interested in petroleum distillate solvents or turpentine.
With all due respect for Gamblin's marketing and PR department, one may either believe or disbelieve that their operation actually entails all the extensive equipment and processes for the fractional distillation of petroleum derivatives. I guess that's OK . . . I usually tend to believe what people tell me . . . and I believe in Santa Claus, too! (I'm a little "iffy" on the tooth-fiary, though.)
Merry Christmas (Hey! I got a new toothbrush! Is that kewl, or what?)
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