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Are you putting them in the fridge for a few minutes during the time they are rapidly crystallizing? That's when they are giving off the most latent heat of crystallization and might actually throw themselves out of temper causing streaks.
Other than that they look quite striking though (and I don't think I would have even noticed those streaks had you not circled them)!
Are you putting them in the fridge for a few minutes during the time they are rapidly crystallizing? That's when they are giving off the most latent heat of crystallization and might actually throw themselves out of temper causing streaks.
