I've seen some posts (not just here) that people say that they use infrared thermometer, is there a reason why you use infrared over a probe thermometer to determine the temp of your plastic??
Also, doesn't infrared read just the surface temperature? (It may be different with plastisol and read a more internal temp, I don't know, I"m just starting out, currently in the process of buying stuff), but wouldn't you want the internal temp to be 350?