Capsules are not marked by normal staining protocols and can be detected by India ink or methyl blue; which allows for higher contrast between the cells for observation.
荚膜没有被正常的染色方案标记，并且可以被印度墨水（英语：India ink）或甲基蓝检测到; 这允许用于观察的细胞之间的较高对比度。