100µg is fairly common. According to Chinacat72 1g of crystal is laid onto ten tenpacks or 10000 doses, equalling 100µg per dose. But the percentage of purity affects this also. Needlepoint, being 98% pure or so, ends up being laid as 98µg; White Fluff, being 95% pure or so, ends up being laid as 95µg and so on. But this is according to a man that was around when the Dead were at the height of their tours and now that they no longer exist as they once have, the honor of laying the sheets honestly may be jeopardy. It could differ from layer to layer now, who knows. But from first hand experience, the Fluff family is still laying their own with pride, respect and reverance