Drugs, Oils & Paints Volume 36

Drugs, Oils & Paints Volume 36

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1920 edition. Excerpt: ...to the extension of lac cultivation, and the establishment of nurseries for the supply of such broodlac in various centers has been frequently recommended. At present it is not unusual for a lessee who has received a concession for collecting lac in a certain tract to strip the forest of lac in the year in which his lease expires, leaving practically nothing to propagate the insect afresh. Elsewhere the system of royalties exists, the royalty sometimes varying, according to the price of shellac in Calcutta. This system. however, appears to have been unsuccessful in Burma and Assam and to have led to a heavv fall in exports. Generally sneaking, lac is cultivated and not merely collected wild in the forest, and a fine upon the cultivation of a particular article is bound to influence the cultivator in deciding what crop to cultivate. There is also the great likelihood that when a royalty is imposed from the top it will grow There are a number of other questions connected with the lac industry which cannot be discussed here in detail. For example. the question of lac dye is of great interest inasmuch as it was originally almost wholly for the production of the dve that lac was collected. In recent years the export of lac dyes has disappeared. both on account of the competition of synthetic dye and because of the vastly increased number of uses to which the resin can be nut. The dve is said be still used for artistic rugs and saris in certain parts of India in preference to the synthetic artir-le. and if this is so. it is certainly regrettable that practicallv all of the lac dye produced is at present thrown away. It has been suggested that the dye liquid might be used as a fertilizer. on account of the rich supply of nitrogen contained in...
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Product details

  • Paperback | 124 pages
  • 189 x 246 x 7mm | 236g
  • United States
  • English
  • black & white illustrations
  • 1236891007
  • 9781236891006