V O L U M E 2 1 , NO. 10, O C T O B E R
1949
19 A
How the RCA ^ ^ he!pS the General Aniline & Film Corporation make better dyes . . . T o A LADY . . . t h e l a s t i n g s h a d e of h e r n y l o n s t o c k i n g s Is a s e r i o u s m a t t e r . I n o r d e r t o i m p r o v e t h e f a s t n e s s of d y e d n y l o n i n h e r stockings... and countless other nylon fabrics... General A n i l i n e s t u d i e s t h e s t r u c t u r e of d y e s a n d p i g m e n t s -with the R C A Electron Microscope. T h i s powerful instrum e n t — c a p a b l e of m a g n i f y i n g a n d r e s o l v i n g 5 0 t o 1 0 0 t i m e s m o r e t h a n a l i g h t m i c r o s c o p e — c l e a r l y shows details of fiber surfaces and dye crystals never seen before! F o r e x a m p l e , e l e c t r o n m i c r o g r a p h s t a k e n of d y e d n y l o n r e p l i c a s b e f o r e a n d after s t e a m i n g , s u b s t a n t i a t e the theories: ( 1 ) that post-dye steaming increases the a v e r a g e size of d y e c r y s t a l s o n n y l o n — w h i c h a c c o u n t s for a d e c r e a s e i n t h e i r h i d i n g p o w e r , a n d a n i n c r e a s e in their fastness t o ultra-violet light ( f a d i n g ) ; ( 2 ) that t h e l a r g e r c r y s t a l s o n t h e surface c a n b e " r u b b e d off" easier than the smaller original crystals—with a consequent loss in fastness. T h i s is just a n o t h e r i n s t a n c e of h o w t h e R C A E l e c t r o n M i c r o s c o p e is h e l p i n g r e s e a r c h i n i n d u s t r y t o i m p r o v e t h e p r o c e s s i n g a n d u s e of c h e m i c a l s , m e t a l s , c e r a m i c s , r u b b e r s , plastics, textiles, petroleum p r o d u c t s , etc. R C A -will b e g l a d t o a p p r a i s e t h e p o s s i b i l i t i e s of t h e Electron M i c r o s c o p e i n your r e s e a r c h a n d quality control. For information, simply write Dept. 48J.
Brown IRRD dye on nylon —silica replica (magnification 15,000 x)
Before steaming
After steaming
(original crystals are small)
(crystals grow enormously)
RCA SCIENTIFIC
Dr, F· A. Hamm ul General Aniline and Film Corp. "fingerprinting" a silica replica of dyed nylon. The RCA Electron Microscope can extend your vision into the range of 1/1000 to 1/1,000,000 of a millimeter!
INSTRUMENTS
R a d i o Corporation of America Scientific Instrument Section Dept. 48-J, Camden, N . J. Please send me literature o n t h e RCA Electron Microscope.
RADIO CORPORATION of AMERICA
Name_
ENGINEERING
Street
PRODUCTS D E P A R T M E N T , CAM DEM, M.J.
In Canada: R C A VICTOR Company Limited, Montreal
Title_ CompanyCity
_Zone_
-State.
