88 



PAINT TECHNOLOGY AND TESTS 



A solidifying dish was partly filled with low melting-point 

 paraffin which was allowed to harden, when a small piece of 

 paint was thrown upon it and then more paraffin poured over it. 

 After hardening, sections were obtained of the paint film by 

 means of a microtome. 



A view of these sections of paint films under the microscope 

 gave to the operator a better idea of the structure of a paint 

 than had ever been afforded heretofore. It was easy to per- 

 ceive the relative position of the pigment particles and the 



Section Barytes Film 



three coats. The penetration of one coat into another was 

 easily discernible, and measurements were made upon the sec- 

 tions in order to determine the average thickness of coat and 

 its general appearance. 



Sections were also made of Inside and Outside White upon 

 wood. These sections revealed under the microscope the thick- 

 ness of the coats and also the penetration of the priming coat 

 into the wood. Appended is a table giving microscopic measure- 

 ments. 



