CASEIN PAINTS. 61 



RING'S COLD-WATER PAINT. 



G. R. Ring, of New Brighton, mixes casein or some other 

 albuminoid substance with a filling of levigated chalk, 

 gypsum, lime, talc, pigments, etc., the whole being ground 

 together. Glue or similar material is then mixed with 

 hydraulic lime, and ground. The two fundamental ingre- 

 dients thus obtained are mixed together, with a further quan- 

 tity of filling material, to form the paint, which is thinned 

 down with water for use. 



FORMOLACTIN. 



Under this name the Aktiengesellschaft fur chemische 

 Industrie " Union," of Vienna, has put on the market a 

 liquid intended for use as a wash or for printing on paper or 

 analogous material in order to make the same washable, 

 waterproof and dustless, besides disinfecting it. Formolactin 

 is a concentrated solution of casein and formaldehyde, thick 

 and milky in appearance. 



When applied as a coating on any surface, formolactin 

 also acts as a disinfectant. This disinfecting action can be 

 renewed at any time by washing the surface over with a 

 1 per cent, solution of formaldehyde, without the use of any 

 special apparatus, and without injuring the paper or any 

 object in the room in the slightest degree. 



On this account formolactin is highly suitable for painting 

 bedrooms, hospital wards, smoking-rooms, living-rooms, etc., 

 the cleaning of which is greatly facilitated by its use. 



In consequence of its content of formaldehyde, formo- 

 lactin destroys any nest of insects present in crevices in the 

 walls to which it is applied. 



The instructions for using this preparation are as 

 follows : 



Formolactin is diluted with a 2 per cent, solution of 

 formaldehyde, prepared by dissolving 5 parts of commercial 



