. Cyclopedia of farm crops : a popular survey of crops and crop-making methods in the United States and Canada. Agriculture -- Canada; Agriculture -- United States; Farm produce -- Canada; Farm produce -- United States. DYES AND DYEING FARM GARDEN 273 to carry out dyeing instructions. The package dyes, sold everywhere, are very serviceable, though not always entirely satisfactory. It should be remem- bered that the after-processes add a great deal to the appearance of the goods, and that amateurs have neither the necessary apparatus nor the skill of the professional dyer. Valuable material sho
. Cyclopedia of farm crops : a popular survey of crops and crop-making methods in the United States and Canada. Agriculture -- Canada; Agriculture -- United States; Farm produce -- Canada; Farm produce -- United States. DYES AND DYEING FARM GARDEN 273 to carry out dyeing instructions. The package dyes, sold everywhere, are very serviceable, though not always entirely satisfactory. It should be remem- bered that the after-processes add a great deal to the appearance of the goods, and that amateurs have neither the necessary apparatus nor the skill of the professional dyer. Valuable material should be sent to a first-class dyer. By carrying out the following tests on small samples, which can be made readily, the suitability of the material for any particular use may be as- certained easily, and much after-annoyance avoided: (1) Fastness to light and atmospheric influences. The sample is exposed to sunlight under glass, and compared from time to time with a reserved part. Expose for two or more weeks; the longer the better. A more se- vere test is to expose to the weather. (2) Fastness to rub- bing. Rub with a piece of white cloth. (3) Fastness to iron- ing. Press with a hot- iron, and compare. (4) Fastness to washing. Wash with hot soap four times, allowing the goods to dry in the air be- tween each two treat- ments. (5) Fastness to al- alkali. Immerse in strong ammonia and then in washing soda (one part in ten of water); dry without washing. (6) Fastness to perspiration. Treat for one hour with a teaspoonful of 30 per cent acetic acid in a pint of water at about blood heat. White wine vinegar diluted with an equal quantity of water will answer. (7) Fastness to boiling in soda. Boil for one hour in a gallon of water in which two ounces of wash- ing soda and one-half ounce of castile soap have been dissolved. Literature. Georgivics, Chemistry of DyestufFs; A. G. Green, Survey of the Organic Colouring Matters; Allen, Commercial Organic Analysis ; Fraps, Principles of Dy
Size: 1454px × 1718px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookidcyclopediaoffarm00bailuoftbookyear1922
