The Testing of Wood Pulp a Practical Handbook for the Pulp And Paper Trades
The Testing of Wood Pulp a Practical Handbook for the Pulp And Paper Trades
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In our eReader you can find the full English version of the book. Read The Testing of Wood Pulp a Practical Handbook for the Pulp And Paper Trades Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book The Testing of Wood Pulp a Practical Handbook for the Pulp And Paper Trades
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To quickly assess the difficulty of the text, read a short excerpt:
The Measurement of Colour.
Comparison of Bleached Samples. The effect of bleaching the pulp at a temperature above that of the air is strikingly illustrated in the time curves, the maximum effect of colour being much more rapidly produced at a temperature of 100 F.
The objections which naturally suggest themselves in con- nection with the use of a somewhat higher temperature than 60 F. Chiefly concern the paper maker in relation to the possible extra consumption of bleach, and the danger of loc...al action in the beating engine if steam is blown into the mixture of pulp and liquor. The experiments give some useful informa- tion on this and similar points.
The samples obtained when made up into sheet form were carefully compared one with another in order to determine which sample in the series showed a maximum white colour.
SERIES 1. BLEACHED AT 100 F.
It was found that the samples bleached with 20 per cent. , 22 per cent. , and 24 per cent, were all equal in colour when compared with one another in the ordinary way in daylight, and that the sample bleached with 18 per cent, was just a shade lower in colour though scarcely perceptible.
What to read after The Testing of Wood Pulp a Practical Handbook for the Pulp And Paper Trades?
You can find similar books in the "Read Also" column, or choose other free books by R W Robert Walter Sindall to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
The Measurement of Colour.
Comparison of Bleached Samples. The effect of bleaching the pulp at a temperature above that of the air is strikingly illustrated in the time curves, the maximum effect of colour being much more rapidly produced at a temperature of 100 F.
The objections which naturally suggest themselves in con- nection with the use of a somewhat higher temperature than 60 F. Chiefly concern the paper maker in relation to the possible extra consumption of bleach, and the danger of loc...al action in the beating engine if steam is blown into the mixture of pulp and liquor. The experiments give some useful informa- tion on this and similar points.
The samples obtained when made up into sheet form were carefully compared one with another in order to determine which sample in the series showed a maximum white colour.
SERIES 1. BLEACHED AT 100 F.
It was found that the samples bleached with 20 per cent. , 22 per cent. , and 24 per cent, were all equal in colour when compared with one another in the ordinary way in daylight, and that the sample bleached with 18 per cent, was just a shade lower in colour though scarcely perceptible.
What to read after The Testing of Wood Pulp a Practical Handbook for the Pulp And Paper Trades?
You can find similar books in the "Read Also" column, or choose other free books by R W Robert Walter Sindall to read onlineMoreLess
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