Which 3M Filter Cartridge?

[Robbie Collins]

I use the 3M 7503 Half Mask Respirator with a face shield when spraying lacquer. I am using 3M 60923 filter cartridges (pink & yellow). This is a P100 particulate filter that also protects against certain organic vapors. Am I using the correct cartridge?

[Glen H]

I'm more familiar with the round carbon activated type that have been around forever, but according to 3m , the cartridge you are using is designed for organic vapors, which includes Nitro solvents.