STUDY OF DRIERS AND THEIR EFFECT 29 



The results of this investigation would indicate that when load 

 or manganese linoleates are used, the most efficient drying is 

 shown with 0.5% lead or with 0.02% manganese, or with a com- 

 bination of 0.5% lead and 0.02% manganese. 



Until more definite results have been obtained with the 

 tungates, which will probably prove of exceptional interest as 

 driers, the above driers will probably be used to the greatest 

 extent. 



Co-operative Drying Tests. A series of important drying tests 

 made by members of a special committee l appointed by the 

 American Society for Testing Materials, of which the writer 

 was chairman, is herewith shown: 



" At the January meeting of Committee D-l, a sub-committee 

 consisting of the following members was appointed to investigate 



paint vehicles: 



G. B. Heckel, 



Glenn H. Pickard, 



Allen Rogers, 



A. H. Sabin, 



H. A. Gardner, Chairman. 



" At a subsequent meeting of the sub-committee it was deter- 

 mined to start the investigations with a series of tests on certain 

 drying, semi-drying, and non-drying oils, determining their 

 drying values, rate of oxygen absorption, etc., when spread out 

 in thin films. A quantity of the following oils was selected for 

 the tests and subsequently secured from sources known to be 

 reliable : 



Lead and manganese linoleate drier. 2 Cottonseed oil. 



Lithographic linseed oil. Sunflower oil. 



Boiled linseed oil (resinate type). Menhaden oil. 



Boiled linseed oil (linoleate type). Chinese wood oil, raw. 



Blown linseed oil (containing drier Chinese wood oil, treated, 

 while being blown). Perilla oil. 3 



Heavy mineral oil. Lumbang oil. 3 



Rosin oil. Dry rosin 20%, boiled in 80% lin- 



Soya bean oil. seed oil. 



Corn oil. 



1 Sub-Committee C of Committee D-l, on Testing Paint Vehicles. Proc. 

 Amer. Soc. for Test. Mater., 1911. 



2 The drier used, upon analysis, showed the presence of 4.36% PbO 

 and 2.51% MnO 2 . 



3 The lumbang and perilla oils were imported and arrived subsequent 

 to the starting of the tests. They were therefore not included in the tests. 



