1872.] Paper at the International Exhibition. 475 
then sealed up together and labelled. The black-bordered 
envelopes are packed in boxes, each box containing one 
gross. 
The Waterproof-Paper and Corrugated Fibre Company 
exhibit specimens of their manufactures, paper and other 
fibrous materials being waterproofed by the solvent action of 
cupro-ammonia. By the agglutinising property of the same 
fluid, combinations of cotton or linen fabrics are made with 
waterproof-paper. This material is manufactured in slabs, 
flat or corrugated, of various thicknesses, for roofing and 
building purposes, waterproof-tubing, panels, and so forth. 
Messrs. Pavy, bretto, and Co. exhibit. all’ over the 
building, elegant curtains made from paper, of very elegant 
appearance, and which can be sold at a price so moderate 
as to place them within the reach of all. 
The material employed is called ‘‘felted fabric.” It is 
not a real tissue, but rather a species of Japanese paper, 
remarkable chiefly for its texture, being firm and tough, 
yet pliable. In point of durability it must compare 
favourably with most other materials used for similar 
purposes, inasmuch as the colours with which it is printed 
are indelible, and do not fade under the effects of sunshine, 
damp, or dust. It is impermeable, light and warm for 
quilts and curtains, and needs no washing. The fibres used 
in this manufacture are subjected, under the influence of 
heat and pressure, to very perfect operations of chemical 
disaggregation, and comminution by mechanical treatment ; 
it is then washed in alkaline and antiseptic baths, crushed 
under ponderous cylinders, and then desiccated and bleached 
by the sulphurous gas; it is then further washed, and the 
fibres disintegrated by grooved cylinders, pulped in poachers, 
and finally felted in a paper-machine modified for the 
special requirements of the manufacture. 
From Sweden there is a case exhibited, showing several 
different uses to which pasteboard is applied in that country. 
It is made from a mixture of straw and rags:—. 
Yellow pasteboard, as it is called, is applied on the inner 
part of the walls of a house to prote¢t the hangings. 
Grey rag pasteboard, which apparently contains a mixture 
of grey ragstone, is used for floorings. 
Raw pasteboard, of which is formed asphalte and roofing. 
Tarred pasteboard, employed to keep out draught and 
moisture in buildings. 
Asphalte roofing pasteboard. 
In China paper is often used in the place of glass for 
windows. This is mostly made in the Corea, and is often 
