Additional examples are adjusted to the entries in an automated way - we cannot guarantee that they are correct.
Let me make it clear that I am not talking only about such obviously bleachable surfaces as dirty grout, shower curtain liners or white T-shirts ambushed by drips of chocolate ice cream.
A rendering process yields a fat commodity (yellow grease, choice white grease, bleachable fancy tallow, etc.) and a protein meal (meat and bone meal, poultry byproduct meal, etc.).
The material may be an ion-doped crystal like Cr:YAG, which is used for Q-switching of Nd:YAG lasers, a bleachable dye, or a passive semiconductor device.