144 PARA RUBBER. 



rubber, and drying ready for despatch is 48 hours. Mr. Holloway 

 assures r me that only mechanical methods are adopted, a point 

 of considerable importance. The illustration on Plate 28, Series A, 

 shows the machinery used by Mr. Holloway. 



Flake Rubber. 

 Flake rubber is quite a recent introduction, and I have to 

 thank Mr. C. 0. Macadam, Culloden, Neboda, for the information 

 on this form of rubber. Flake rubber is made by Mr. Macadam by 

 placing small pieces of freshly-coagulated rubber in a small rolling 

 machine or washer, the corrugations of which run horizontally ; the 

 rollers are close together and the cut rubber issues as thin strips. The 

 strips or flakes are very thin, and can be easily smoked and packed in 

 any form. The sample I have seen was pale amber in colour, free 

 from mechanical impurities, and possessed good physical properties. 

 It is apparent that the very thin flakes can be rapidly dried, and in 

 this respect compares very favourably with crepe or lace rubber 



Scrap Rubber. 



Scrap rubber is mainly the coagulated rubber obtained from the 

 incised areas, rolled into balls or made up into cakes. It may be 

 sent to Europe in the crude state, with all its mechanical impurities, 

 or washed, purified, and converted into crepe rubber before being 

 despatched. Scrap rubber, if free from bark, dirt, and other impu- 

 rities, obtains a high price. 



Analyses of Plantation Rubber. 

 The following analyses of the different forms of rubber are tabu- 

 lated for reference, though a wide variation must be allowed in each 

 case. A general average composition cannot be given until more 

 analyses have been made : — 



100-00 100-00 100-00 100-00 100 00 100 00 100-00 



I am indebted to Mr. M. Kelway Baniber for the analyses 

 of biscuit, lace (A), and worm rubber, and to Mr. P. J. Burgess, 

 for the privilege of using the analyses of crepe rubber from the Straits 

 by Herbert Ballantyne, F.I.C., F.C.S. 



* By Ballantyne, in India Rubber Journal. 



