To provide a structural color material and a cosmetics using the same, the structural color material is consisted of resin particles having a structural color, and the resin particle is a resin particle obtained by feeding a fluid which mixes an aqueous medium containing water-soluble free radical polymerization initiator and a free radical polymerizable monomer at a constant flow rate in a small tubular runner, and conditioning instantaneously the fluid temperature to a temperature set in advance, after that, reacting a part of the free radical polymerizable monomer in the presence of the water-soluble free radical polymerization initiator, to form uniform particle nuclei of resin particles in the small tubular runner, then subjecting the polymerization reaction solution containing obtained particle nuclei to polymerization reaction using a reactor appending a stirring apparatus the average particle diameter of the resin particle is in the range of 150~400 nm, and the absolute value of zeta potential is in the range of 30~80 mV.茲提供一種構造色材料及使用其之化妝品,該構造色材料係由帶有構造色之樹脂粒子構成,該樹脂粒子係在微小管狀流道內,以一定的流量注入混有含水溶性自由基聚合起始劑之水介質及自由基聚合性單體的流體,使流體溫度瞬間達到預先設定之溫度後,於水溶性自由基聚合起始劑存在下,使自由基聚合性單體一部分反應,藉以使均勻之樹脂粒子的粒子核在微小管狀流道內形成,再利用附有攪拌裝置之反應釜使含有所得粒子核之聚合反應液進行聚合反應所得到的樹脂粒子;該樹脂粒子之平均粒徑係處於150~400nm之範圍、仄他電位的絕對值處於30~80mV之範圍。
