The manufacture of paper: being a description of the various processes for the fabrication, coloring, and finishing of every kind of paper .. by Davis Charles Thomas

Author:Davis, Charles Thomas. [from old catalog]
Language: eng
Format: epub, pdf
Tags: Papermaking
Publisher: Philadelphia, H. C. Baird & co.; London, S. Low, Marston, Searle & Rivington
Published: 1886-03-25T05:00:00+00:00

would thus be continually returned to the contents of the matrass m sufficient quantity to interfere with the complete precipitation of the carbonate of lime. The boiled water, when cold, is poured into a flask having a capacity of 500 c. c, and the matrass rinsed out with distilled water, the rinsing being added to the water in the flask. The latter is then filled with distilled water up to the mark, and the entire contents filtered through a dry filter into a dry glass.

The degree of hardness of a definite number of cubic centimetres is then determined in the manner above described.

The English degrees of hardness are reduced to German by multiplying the degrees found by 4 and dividing by 5, the reduction of German to English degrees being vice versa accomplished by multiplying by 5 and dividing by 4.

Waters possessing the properties of hardness are unsuitable without purification to be used in mills where the best qualities of white papers of any class are manufactured.

Various methods for purifying water for use in paper-mills have been proposed, some mills using surface streams run their water first into large settling ponds into which it is admitted only when it is comparatively clear.

Other manufacturers use filters especially manufactured for this purpose; but as these filters are made in a great variety of ways and their virtues fully set forth in the advertising columns of various trade papers, we will not devote space to a description of them.

In some mills separate filters are attached to each washing and beating engine.

22

Download

Copyright Disclaimer:
This site does not store any files on its server. We only index and link to content provided by other sites. Please contact the content providers to delete copyright contents if any and email us, we'll remove relevant links or contents immediately.