370 



The Philippine Journal of Science 

 Table XXV. — Weights of tanned hides. 



1916 



Weights of Filipino' Weights of leather 

 tinned hides. .*'^°? ^"^^^ tanned 

 m this experiment." 



Austra- 

 lian 

 cattle 

 leather. 



Chinese 



cattle 



leather. 





Kilo. 

 11.5 

 10.0 

 12.5 

 11.0 

 10.5 

 12.0 

 10.5 

 13.0 



Kilo. 

 9.0 



10.0 



9.0 



10.5 



KUo. 

 11.5 

 17.0 

 16.5 



Kilo. 

 13.0 

 11.0 

 13.0 

 14.0 

 12.0 

 20.0 



9.0 

 10.0 



9.0 

 10.0 

















* These hides are arranged in the same order as in the list of raw hides above in Table XXI. 



The average weight of hides tanned by the improved process 

 is approximately 32 per cent greater than that of those ordi- 

 narily produced. In other words, the Filipino tanner obtains 

 about 3 kilograms of leather from 6 kilograms of green pelt, 

 while by the improved process this yield of leather is increased 

 to about 4 kilograms of higher grade product. Table XXVI 

 shows the degree of tannage in native leathers as compared 

 with those produced by the improved process. 



Table XXVI. — Chemical analysis of leather. 



Improved product 



Filipino product .. 



Do 



Mois- 

 ture. 



Parts per 100 of 

 water-free ma- 

 terial. 



Hide sub-^ Tanning 



Per cent. 

 14.1 

 16.5 

 16.3 



I 



stance. 



and ash. 



50.1 

 61.4 

 62.9 



- 



49.9 

 38.6 

 37.1 



The color and grain of the hides produced by the improved 

 process, while not perfect, were entirely satisfactory for local 

 market conditions, and the actual increase in the value of the 

 goods by these improvements far exceeded the small increased 

 cost of putting them into effect. Local tanners were alarmed 

 by the large quantities of tan bark which were added to the laying 

 pit. It was difficult for them to realize that no tannin is wasted, 



