but how many times did you take it, and how many different people took it, and without sharing the experience with each other, felt the same thing? Can you discount 100% the set and setting and self-suggestion and your own metabolism and the day's weather and time of the day and whatever else? Not trying to discount your conclusion, but I see so often people claiming that blotter X causes trips of Y type, but these people never even consider the self-suggestion and set and setting possibilities, which I think are one of the main things we have to consider, knowing how important this is for psychedelic experiences.
Not that Im claiming for sure there arent different effects, I just dont know and only scientific testing would tell, but I do know from all I've read on lsd and synthesis and talked with people who knew their stuff, that the possible impurities present in LSD synth (like iso-lsd) were inactive or not active in the amounts present, even taking multiple doses. Maybe there is a synergy with some compounds that alone are not active, maybe there are other compounds I never read about, maybe your blue sun blotter was something else, its all possible.... But I think its important to make many questions before coming to conclusions.