1. Mix the following ingredients: a cup of blossom fresh bleach, a tablespoon of salt, a pinch of coffee and sugar, a teaspoon of vinegar, catsup and oyster sauce.
2. Pour the mixture in a can. A used sardine can will do.
3. Soak the film strips for one hour.
4. Pour a hot water and leave it for 20 minutes.
5. Get the film and let it dry.