50 And 100 Years Ago; April 1995; Scientific American Magazine; by Staff Editor; 1 Page(s)
APRIL 1945 Wool, which retains its original appearance, yet is protected against shrinkage, even after repeated laundering and dry-cleaning, is now commercially available through the use of a new synthetic resin known as Lanaset. When applied to the fabric, Lanaset stabilizes wool and wool blends without affecting the absorbency normally characteristic of wool. It also reduces felting and prevents fuzzing.
Metallurgists, in the examination of metal surfaces with the optical microscope, have long recognized serious weaknesses in this procedure. The surface under observation very frequently does not offer adequate evidence of the true shape of the details and in many cases is even misleading. However, a newly developed microradiographic technique is able to give an indication of the three-dimensional contours of the metal structure and is able to indicate the distribution and identity of the chemical components of the metal in a precise manner.