... be divided into the following two kinds: The first one: iron series self-reaction type, it utlizes the chemical reaction of ... .Green tea, seaweed, dry vegetable, coffee4)Get rid of pest, rust.Precision parts, clothes, furry, Painting and calligraphy, precious metals, pharmaceuticalsHowever ... . lDo have a check that the indicator is pink. lTake out the needed quantity after open the bag. Put the sachets ...