The transparent empty capsule shell is for the user to determine whether the capsule is granules or powder, which is convenient for use. In addition, after some capsules have deteriorated, the internal particles or powder have changed, which also reminds users to pay attention to whether the inside of the capsule is safe and normal.
So why are some capsules colored and the cap and body different colors? One is the color caused by the sunscreen. For some light-sensitive drugs, titanium dioxide can be added to the capsule as sunscreen, so the color will appear.
The second colored capsule shell, which looks good on the senses, can hide the appearance of the medicine itself.
The two-color capsule shell is easy to identify and can distinguish capsules made by different production processes to avoid confusion.
The last point to mention is the different colors, just to simply distinguish the medicines. Because manufacturers use capsule shells of different colors, it is convenient to identify capsule bodies and capsule caps with different calibers, so as to avoid errors during mass production, resulting in high-speed assembly line failures and losses.