ROWELL: METHOD OF MAKING FOLIAGE 9 



cover) and pour in butyl acetate until it comes almost to the top of the cellulose. 

 This mixture should be about the right consistency; if it is too thin, add more 

 cellulose. Use butyl acetate for thinner and for cleaning molds. 



Artists' oil colors for tinting the cellulose. Very small amounts are required. 

 Mix the color into a small amount of cellulose nitrate solution, then add this 

 mixture to the full amount of the solution. 



Acryloid B 72, which is made by Rohm and Haas, Wa^ington Square, Phila- 

 delphia 5, Pennsylvania. For thinner use toluol or xylene (xylol). 



For molds use catalin, plaster of Paris, or metal. 



A satisfactory impregnating material for plaster molds is Plaspreg, sold by 

 Furane Plastics, Inc., 719 West Broadway, Glendale 4, California. 



A good wetting agent is Perma-Flex Mold Dressing, made by the Perma- 

 Flex Mold Company, 243 North 5th Street, Columbus 15, Ohio. Use one part 

 for the separator formula as given. 



