- Joined
- Mar 19, 2018
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- 24,476
If the carbon layer is the coarsest it would point to the outside and the finest would be inside, closest to your nose and mouth. Saying that, carbon is usually in the middle or at least behind a coarse layer.So which way round? on a gas mask the carbon filter would be closest to your face?
In this pic, the carbon would be the 2nd (grey) plate (as an example) and the arrow would be going up your nose