how to make starfruit acid

first choose the old starfruit and ready in the picking, take as much as you want, then dry and cover with a thin plastic paper to quickly inert, after inert lift the plastic, then drying as usual without plastic, drying all day full day, wakyu afternoon lift and give salt until evenly samua not moldy, do every day like that until three days, if the weather is really hot, dried kiliatan acid and ready for the old save.