Article in English: How long you soak depends on the effect you want. For a more defined acid washed effect, soak the jeans longer. This will strip them of more color. For a mild look, only soak the jeans for about half an hour. Check on the jeans regularly if you're unsure of how long to soak them. Once you see the effect you want forming, you can remove the jeans. Use a cold cycle in the wash. You will want to run two cycles. Run one cycle without detergent, and then another with detergent.  After two wash cycles, hang your jeans to dry. Do not put them in the dryer. You should now have a pair of acid washed jeans.

Summary in Indonesian:
Rendam celana selama 30 menit hingga 1 jam. Cucilah dan keringkan celana Anda.