"where did you go that was 100F?"
My neighborhood, yesterday! It is in the mid 90s today; maybe hotter, since my thermometers are not the best (one is built into a Digiflash, and the other is an old darkroom dial thermometer taped to my Sinar).
"When you say 'pearl', do you mean 'silk'?"
Yes; silk, not pearl. I looked at the data sheet again, then changed the OP, only to see that you had posted this question in the meantime.