Uji aktivitas antioksidan teh celup kombinasi rimpang temulawak (Curcuma xanthorrhiza Roxb.) dan rimpang temu mangga (Curcuma mangga Val.) dengan metode peredaman radikal DPPH = antioxidant activity test of the tea bags preparation of ginger rhizome (Curcuma xanthorrhiza Roxb.) and mangga Rizhome (Curcuma mangga Val.) combination with DPPH free radical scavenging method