98 CASEIN. 



more water, according to requirements, the water of satura- 

 tion usually sufficing to make the mass plastic. The product 

 is a tough, sticky mass which can be pressed into flat cakes 

 or any other suitable shape. The preparation is specially 

 adapted for various decorative or useful articles ; and the 

 further treatment may consist in rolling, pressing, moulding 

 or any other suitable process. 



LILIENTHAL'S PLASTIC MASS. 



The ingredients of this preparation consist of caustic 

 strontia, powdered marble or limestone and casein, the follow- 

 ing proportions being recommended : powdered marble or 

 limestone, 3 to 4 parts ; caustic strontia, 1 part ; and a 

 quantity of pressed casein equal to about one- sixth of the 

 other two substances. They are mixed together in any suit- 

 able mixer or stirrer, the strontia and casein combining to 

 form a very firm binder which imparts great hardness and 

 strength to the articles made from the mixture. The mass 

 is formed into the desired shape by moulding under heavy 

 pressure. 4 



JUNG, BRECHER & KITTEL'S INSULATING PREPARATION. 



This preparation is made of a mixture of casein and vege- 

 table oils, which latter may be either in a natural state or 

 sulphonated. The low price of rape oil, linseed oil and castor 

 oil renders them specially suitable for the purpose. The casein 

 may be prepared in any suitable way, and is used either in 

 the state of dry powder, the pressed damp condition, or dis- 

 solved in alkali, borax or other solvent. In the two former 

 cases the oil is kneaded in until a homogeneous, gelatinous 

 mass is formed, but when dissolved casein is used the liquid 

 is evaporated until a kneadable mass is formed, and this is 

 mixed with the oil. 



The preparation may then be worked up alone or in ad- 



