From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Index and preface for a report on the study of paper materials and their testing methods for electrical insulation.
| Identifier | ExFiles\Box 24\2\ Scan237 | |
| Date | 30th January 1923 guessed | |
| 658 DIRECTIONS FOR THE STUDY OF Page Japanese Tosa tissue paper, definition of . . 660 Jute fibre, use of, in paper . . . . 659 Jute paper, definition of . . . . . 659 Kaolin, use of, in loading . . . . . 660 Kjeldahl, method for determination of nitrogen . 664 Kraft paper, definition of . . . . . 659 “L” piece, use of, in tearing test . . . 662 Leather paper, definition of . . . . 659 Lime rag-pulp paper, definition of . . . 659 Loading, process of . . . . . . 660 Machine finish, definition of . . . . . 661 Manilla fibre paper, definition of . . . . 659 Manilla paper, definition of . . . . . 659 Mechanical wood-pulp paper, definition of . . 659 Metallic particles, chemical test for . . . 664 Metallic particles, in rope paper . . . . 664 Methyl orange, as indicator . . . . . 664 Micro-photographs, reproduction of, showing fibres . 668 Microscopical examination of fibres . . . 665 Mill finish (see Machine finish) . . . . 661 Mineral ash, test for . . . . . . 664 Mineral pigments, use of, in colouring process . 660 Moisture loss on drying . . . . . 662 Nitrogenous material, determination of, in size . 664 Paper, definition of . . . . . . 659 Paper mulberry, use of, in tissue paper . . 660 Paraffin wax, use of, in glazing . . . . 660 Parchmentising, process of . . . . . 660 Porosity, test for . . . . . . . 662 Potassium ferrocyanide test for iron particles . 664 Potassium hydrate, in acid test . . . . 664 Potassium iodide, in preparation of stain . . 665 Rag bank paper, definition of . . . . . 659 Rag bond paper, definition of . . . . 659 Rags, cotton, use of, in papers . . . . 659 Rags, linen, use of, in papers . . . . 659 Ream, number of sheets in . . . . . 660 Red rope paper (see Rope paper) . . . . 659 Resin, determination of, in sizing tests . . 664 Resin sizing, process of . . . . . 660 Resin, treatment of pulp with . . . . 660 Resins, ether-soluble . . . . . . 664 Rollers, for flash test . . . . . . 665 Rope paper, definition of . . . . . 659 Schedule of tests . . . . . . . 667 Silver nitrate, test for metallic particles . . 665 Silversmiths’ tissue paper, definition of . . 659 Siphon cups, for sizing test . . . . . 664 Sizing, process of . . . . . . . 660 Sizing, test for . . . . . . . 664 Soda rag-pulp paper, definition of . . . 659 Soda wood-pulp paper, definition of . . . 659 Sodium chloride, removal of glue with . . . 664 Sodium hydrate, treatment of cellulose with . . 660 Sodium hydrate, use of, in acid test . . . 664 Sodium resinate, use of, in sizing . . . 660 Soft sizing (see Gelatine sizing) . . . . 660 Stain, zinc-chloride-iodine . . . . . 665 Staining, definition of . . . . . . 660 Sulphate wood-pulp paper, definition of . . 659 Page Sulphite imitation Japanese tissue paper, definition of 660 Sulphite tissue paper, definition of . . . 659 Sulphite wood-pulp paper, definition of . . . 659 Sulphuric acid, for acidity test . . . . 664 Sulphuric acid, for controlled atmosphere . . . 661 Super-calendering, process in glazing . . . 660 Superfine litho paper . . . . . . 661 Tearing strength, test for . . . . . 662 Tensile strength, test for . . . . . 661 Tension, crinkling under . . . . . 665 Tests . . . . . . . . . 661 Thickness, determination of . . . . . 661 Tissue paper, definition of . . . . . 659 Treatment, processes of, in manufacture . . 660 Treatment, tendency to crinkle after . . . 665 Tub sizing (see Gelatine sizing) . . . . 660 Ultramarine, for producing whiteness . . . 660 Viscose sizing, process of . . . . . 660 Voltage, for flash test . . . . . . 665 Wickstroemia puciflora, use of, in tissue paper . 660 Zinc chloride, use of, in treating paper . . 659 Zinc-chloride-iodine stain, composition and preparation of 665 PREFACE. For several years this Association (and its predecessor, the E.R.C.) has been engaged in the study of papers to be employed for insulation (other than in the construction of electric cables) and in devising tests suitable for their examination. During the course of the work the leading electrical manufacturers furnished particulars of the papers they were using for a variety of purposes, and their requirements in connection with such uses. Full particulars were obtained from the paper manufacturers also, of the methods employed in manufacture and the materials used. It soon became evident that there was no reliable system of nomenclature for these materials, the descriptions employed being fancy terms, or terms but loosely connected with particular qualities or materials. With the assistance of the parties interested a schedule of definitions has been prepared and is presented herewith, the use of which should go far to remove present ambiguities. A large number of papers were then examined and tested in a variety of ways, and, as a result, a series of tests has been developed which have proved suitable for ascertaining the properties of chief importance which these materials should possess. These tests are described in the following pages, and are here presented in the confident belief that their use will lead to improvement in product. They are not devised as purchasing or acceptance tests, but furnish a basis for the development of such tests, which properly belongs to the activities of the British Engineering Standards Association. The data collected during the course of the work done will be useful to this end, and will be incorporated with other additional information in a report to follow. | ||