Sentence:  A well publicized entrant which has achieved success only recently is the <WSD>built</WSD> liquid detergent , with which the major problem today is incorporation of builder and active into a small volume using a sufficiently high builder / active ratio . 
Meaning of the word marked with <WSD> tags:  (used of soaps or cleaning agents) having a substance (an abrasive or filler) added to increase effectiveness