OCR Text |
Show JO CLEAN BRASS CASTINGS Dip Into Solution of Sulphurlo and Nitric Ni-tric Acid nnd Salt Rinse In Clean Water. Brass castings rany ho cleaned In nn Instnnt by dipping them Into u solution of threo parts of sulphuric ncld and three parts of nitric ncid, to which, nft-er nft-er they hnvo been mixed, thcro has been ndded ono part of common snlt, tho wholo being stirred until the salt' bns been dissolved. If this rnlxturo Is placed In nn cnrthcnwnro vessel, the brass castings can bo dipped In It, removed re-moved Immediately, nnd rinsed In clear water. Tho castings enn bo mndo ns bright ns now by this method nnd llttlo labor Is Involved. |