Abstract Research topic: the acid from fruit juiceName: Miss Chuealaong Thanatphon research Prang Phimphika Miss Sri Arun The boys enjoy happiness or utilityConsultant: rachanet Pan tunAcademic year: 2557 (2014) AbstractThis study has the objective 1) to study the concentrations of lime juice, Orange, pineapple, 2) to compare the performance of the acid from the lime juice, Orange, pineapple, that can get rid of the stains, ink stick on clothing, academic year divided into trial operation 2557 (2014) trial as a 2 step. Step 1 is the value of acid fruit juice and sorted from most to least value by bringing fresh-squeezed orange juice, lime, pineapple, Orange, lemon, pineapple and water use brought onto the Universal Studios vacation. Sort by level up is acid. From high to low value Step 2: learn the ability to corrosion stain of ink stuck on the pineapple, Orange, lemon, taking clothes to squeeze out. The fabric was tested by the ink stains soaked in each type of fruit juice and leave for about 30 minutes to observe whether any kind of fruit juice can stain remover is the best. Study results showed that 1) orange juice PH values concentration value equal to 4 lemon juice PH values concentration value equals 3 pineapple juice has a pH value of concentration is equal to 3.2) pineapple juice and lemon juice can stain remover is the best.
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