I/EC
ticularly effective in indicating pip ing changes. T h e engineer, instead of preparing complex blueprints, merely marks the desired changes on a transparent overlay placed over a p h o t o g r a p h of the existing piping. This method can be cheaper, faster, a n d easier t h a n making complete engineering drawings. It's espe cially recommended where the j o b must be t u r n e d over to unskilled workers w h o might boggle at reading blueprints. I n all phases of research, analysis, a n d production in the chemical in dustry, the c a m e r a is making its i m p a c t felt. Although m a n y in dustrial uses for photography have come to the fore only within the past few years, others are as impor t a n t today as they were decades ago. T h e n as now, the c a m e r a is provid ing for a presumably grateful pos terity e n d u r i n g images of the plant a n d of those merry-making guests at the a n n u a l c o m p a n y banquet. H.J.S.
How to put greater
PROTECT-ABILITY in your Metal Protective Paints Your customers demand the greatest ability
in paints they use for
bridges, railway
protect-
protecting
signals, w a t e r towers, fire
escapes, other steel structures a n d
REPORTS
equip
ΟΕ3Ξ
ment including metal furniture. G i v e it to them!
Ozone for Oxidation
Two Pure Black Iron Oxides Try formulating with either of these two Pure Black Iron Oxides made by Williams f o r just this purpose. Both produce tough, non-porous, elastic films o f high protect-ability.
unusually-
Used in combination with either zinc
chromate or r e d l e a d , they can be formulated to give metal protective paints o f exceedingly long life.
O u t l o o k is bright and getting brighter as a d v a n tages begin to outweigh problems
W*
ZONE, t h a t scarce allotropie form of oxygen, is receiving lots of attention lately as an industrial oxidant. It's extremely powerful— second only to fluorine in oxidationreduction potential—although this advantage is also one of ozone's big handicaps. Ozone is the air all a r o u n d us. I n m i n u t e quantities, it can purify air by destroying odors a n d bacteria. But even a t 1 p.p.m., ozone be comes obnoxious, causing eye a n d throat irritation. And just a little more in a test t u b e could start a violent reaction. But despite a n d because of its activity, ozone is finding a place in industry. Emery Industries in Cincinnati uses ozone to oxidize oleic acid to azelaic a n d pelargonic acids. A r m o u r has a pilot process
O For samples, ask your Williams representative or write us today for complete technical information. Address Dept. 2, G Κ. Williams & Co., Easton, Pa.
WILLIAMS COLORS
&
PIGMENTS
C . K . W I L L I A M S & C O . · E a s t o n , P a . · East S t . L o u i s , I I I . ·
Emeryville,Cal.
108 Shades & Types of I r o n O x i d e P i g m e n t s , C h r o m i u m Oxides & Hydrates For further information, circle number 28 A on Readers' Service Card, page IIS A 28 A
INDUSTRIAL AND ENGINEERING CHEMISTRY
