CODE FOR IDENTIFICATION OF GAS-MASK CANISTERS 3 
MARKINGS OTHER THAN COLOR 
11. On each canister shall appear, in bold letters, a brief statement 
to show the purpose of the canister, for example: 
FOR USE ONLY IN ... 
"77 (Name of gas or gases) 
FOR USE ONLY IN ._.__. -ccooc-cccicew-—-._. AND IN DUSTS 
(Name of gas or gases) 
FOR USE IN AIR CONTAINING ANY GAS OR SMOKE 
12. For this purpose it is permissible to attach a metal plate bearing 
the proper inscription in raised or other distinct letters, or to stamp 
the statement into the metal of the canister with a male and female 
die. The statement may be marked with decalcomania, stenciled 
with paint, or paper labels may be used. The latter should be 
attached with heat-proof cement. 
13. All of the markings specified above should be placed on the 
most conspicuous surface or surfaces of the canister.