Textiles — Determination of fineness of flax fibres — Permeametric methods
Fineness can be considered as a vital characteristic of flax. However, because their special structure, the measurements of the fineness of such fibres presents a difficult problem. Two permeametric methods for the determination of the fineness of flax fibres are specified (a reference method, with two compressions, using a test piece of parallel fibres and a simplified method, with one…
Plastics — Homopolymer and copolymer resins of vinyl chloride — Determination of volatile matter (in...
A test portion of resin is spreaded out in a weighing dish, weighed to the nearest 0,000 5 g and dried at 110 °C to constant mass. The volatile matter is expressed as percentage of the original weight.
The Standard specifies certain characteristics of the oil. The oil shall be clear and almost colourless to pale yellow, the odour characteristic, recalling cineole. The relative density at 20/20 °C has to ly between 0,906 and 0,925 and the refractive index at 20 °C between 1,4590 and 1,4670. The optical rotation shall range from 0 to + 10 . 1 volume of the oil shall not require more than 5…
Parallel shank jobber and stub series drills and Morse taper shank drills
This secon edition, which superseded ISO 235-1:1975, incorporates draft Amendment 1. ISO 235 specifies in dimensions of the above mentioned drills. It comprises, for each type of these drills, three tables giving respectively the dimensions in millimetres, the dimensions in inches, the corrsponding length, in millimetres and in inches, set out as functions of diameter steps.
Textiles — Cotton fibres — Equipment and artificial lighting for cotton classing rooms
Specifies requirements for artificial illumination used for judging the colour of cotton accurately and uniformly. Also describes a method of test for appraising the colour quality of lamps procured for this purpose. Includes requirements for colours to be used on walls and other surfaces in cotton classing rooms, and for maintaining the required level of the performance of lighting system.
Air quality — Determination of mass concentration of sulphur dioxide in ambient air — Thorin spectro...
Applies to the range of 3,5 to 150 micrograms per cubic metre, assuming an
air sample volume of 2 m3 and a sample solution volume of 50 ml. For
higher concentrations, dilution of the sample may be
necessary.
Maize — Determination of moisture content (on milled grains and on whole grains)
A section one specifies the reference method. It consists in grinding of sample, if necessery, after pre-conditioning, if required, then drying of a test portion at a temperature between 130 and 133 C under conditions which enable a result to be obtained which is in agreement with that obtained by the absolute method ( prescribed in an annex). A section two specifies the routine method on whole…
Data processing — Implementation of the ISO 7- bit and 8- bit coded character sets on punched cards
Defines implementation of ISO 7-bit and 8-bit coded character sets on punched cards as well as the representation of 7-bit and 8-bit combinations on 12-row punched cards. This representation is derived from, and compatible with, the Hollorith Code. Ensures widely compatibility with existing punched card files. Intended for general interchange of information among data processing systems.
Anodizing of aluminium and its alloys — Determination of the fastness to ultra-violet light of colou...
The test represents very severe exposure to ultra-violet light and provides therefore a very rapid determination of light-fastness. Care must be taken in comparing the results of this test with the results of exposure to sunlight. The surface temperature generated by the light source can reach up to 90 °C, and this light source is not, therefore, suitable for testing of heat-sensitive anodic…
