yda-i:amalgam capsules yda-i and yda-ii are high compressive strength alloys, yda-i contains 45%ag and yda-ii contains 70%ag. both of them have no zinc, no gamma ii and minimize the risk of fracturing the restoration. the high quality ensures a tough, durable and long lasting restoration and the sufficient condensation enables the easy way of packing. formula: (1) yda-i: 45% ag, 30% cu, 25% sn. (2) yda-ii: 70% ag, 5% cu, 25% sn. particle: irregular shapes available in four types: 200mg (white cap) 400mg (yellow cap) 600mg (blue cap) 800mg (red cap)