This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1915 Excerpt: ...points to admixture with " distilled grease stearine " (cp. Chap. XVI., and Vol. I. Chap. XI.). The amount of ash should be practically nil. It is important to determine the ash, as a definite amount, even 0-01 per cent, may lead to guttering of the finished candle. Neutral fat (cocoanut oil) is sometimes added to ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1915 Excerpt: ...points to admixture with " distilled grease stearine " (cp. Chap. XVI., and Vol. I. Chap. XI.). The amount of ash should be practically nil. It is important to determine the ash, as a definite amount, even 0-01 per cent, may lead to guttering of the finished candle. Neutral fat (cocoanut oil) is sometimes added to prevent crystallisation if paraffin wax alone does not effect this satisfactorily. The examination of the ash for lime and its quantitative determination is also required, as even very small quantities of lime left in the candle material cause the wick to yield a skeleton, which does not melt and drop off, but ultimately hangs down into the candle material and causes guttering. Graefe 1 showed that even as sniall a quantity as 00075 per cent of lime (CaO) in the candle material is apt materially to injure the quality of an otherwise well-prepared wick. Ten times that quantity of lime--viz.-0075 per cent--in a candle material would render the candles prepared from it unsaleable.2 The stearines obtained from greases generally contain notable amounts of unsaponifiable matter. The stearine from " black grease " (see Chap. XVI.) and other waste fats are also characterised by high amounts of unsaponifiable matter (cp. " Waste Fats," Chap. XVI.). Candles consisting of " stearine " only are chiefly used in tropical or semi-tropical countries, where candles made from a mixture of stearine and paraffin wax would bend and gutter owing to their low melting points. In temperate climates candles are usually made from mixed " stearine " and mineral waxes. Hence the unsaponifiable matter must be determined and examined. (b) Mixed "Stearine" and Mineral Wax Candles (a) PARAFFIN WAX Since a description of ...
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Add this copy of Chemical Technology and Analysis of Oils, Fats and to cart. $50.41, good condition, Sold by Bonita rated 4.0 out of 5 stars, ships from Santa Clarita, CA, UNITED STATES, published 2011 by Nabu Press.
