MANUFACTURE 

 The process of manufadure consl^s in : — 



1 . Weighing and mixing 1 The 



2. Milling and incorporating J Ingredients 



3. Granulating 



4. Drying 



5. Sifting and sizing ■ The Grain 



6. Hardening and waterproofing 



7. Final sifting and sizing 



8. 1^ Blending ] The 



9. 2nd Blending J Finished Powder 

 Every final blend results in a batch of powder of two 



tons weight, to which a batch number is allotted, which 

 enables it to be traced at any future time. 



PROOF 

 Samples of powder are taken haphazard from the 

 preliminary blends, and some of the tests afterwards 

 described applied to them, but it is not until it has become 

 a final and two ton batch that all the teils are made in 

 rotation and the results recorded. 



The batch te^s are as follows : — 

 {ii) Under normal conditions. 



1 . Velocity 4. Ignition 



2. Pressure 5. Penetration 



3. Recoil 6. Pattern 

 (/^) For damp le^. 



Velocity. — After being placed in a vapour bath for 

 24 to 36 hours In an atmosphere saturated with 

 moisture. 



