Grade colour

Unlike the other tests in this section the grade colour is not a performance test but is a test of the whiteness of flour. The Kent-Jones and Martin colour grade is measured by comparing the reflecting power of a dispersion of flour in water with a standard reference surface. A few patent flours give a negative colour grade, which merely indicates that they are whiter than the reference. 

Pasteurized blended cheese =S43 >41 Cheese cream, anhydrous milk fat, dehydrated cream (in quantities such that the fat derived from them is less than 5% (w/w) in finished product) water salt food-grade colours, spices and flavours mould inhibitors (sorbic acid, potassium/sodium sorbate, and/or sodium/calcium propionates), at levels sgO.2% (w/w) finished product... 

Basic raw material are low-grade, coloured-firing clays. Non-plastic substances are added in the form of sand, slag, fly-ash, etc. The proportions added are given by the required forming properties and behaviour on firing. 

Clariant has added more than 50 colours to its cadmium-free Universal range, making a total of 180 colours. Special effects have been extended to include wood, pearlescence, and edge-glow effects. Colloids has also added 15 stock film grade colour masterbatches to its existing 3 5 colours to meet the restriction on heavy metals in the EC Directive on Waste Packaging, 94/62/EC, Article 11. 

Grade Colour Code Coalescing Efficiency Max. Oil Carry Over Pressure Diff. ... 

Comments All flame retardant, ext = extrusion, inj = injection moulding, tm = transfer moulding, ADG = aqueous dispersion grade. Coloured grades available. ... 

The UL94 rating is awarded to a specific grade of material and may also vary with the colour. It is also dependent on the thickness of the sample and this should also be stated. Clearly, if two materials are given, for example, a V-0 rating, that which achieves the rating with a thinner sample will be the more fire retardant. 

Such a value for relative temperature index will be specific to a particular grade of a polymer, sometimes even to a specific colour. The difference between grades of a particular species of polymer can be substantial, depending both on the variation in the inherent stability of a material between differing manufacturing methods and also on the type and amount of additives used. It is possible to obtain from the Laboratories a Generic Temperature Index to cover a species of material but this will usually be considerably lower than for many of the individual grades within that species. 

Neoprene AD ( 95 ). This is more stable than Neoprene AC. This polychloroprene does not change colour in contact with iron and viscosities of the solutions are maintained stable over long periods of time. They are fast ciystallizing grades and contain about 90% trans-1,4 structure. 

The most satisfactory test for caramel is to shake with Fuller s earth, as recommended - by Crampton and Simons. If the colour is due to caramel and a grade of I uller s earth is used, which experience has proved suitable, the solution, after filtering, is yellow or colourless. This test does not positively identify the colour, as some other brown substances may give similar reactions, but no such substance is liable to be present in vanilla extract. 

Swedish standard SIS 055900 contains two pictorial standards for manual cleaning, St2 and St3. Both require the removal of loose millscale, surface rust and foreign matter. The second and higher standard describes the prepared and dusted surface as having a pronounced metallic sheen. The St2 preparation is described as a faint metallic sheen . Both are expected to correspond with their respective coloured prints in the standard. These relate to four grades of new unpainted steel ... 

In many cases the analytical grade material may be replaced by pure recrystallised silver nitrate, but in that case it is advisable to standardise the solution against sodium chloride. Solutions of silver nitrate should be protected from light and are best stored in amber-coloured glass bottles. 

Procedure (copper in crystallised copper sulphate). Weigh out accurately about 3.1 g of copper sulphate crystals, dissolve in water, and make up to 250 mL in a graduated flask. Shake well. Pipette 50 mL of this solution into a small beaker, add an equal volume of ca AM hydrochloric acid. Pass this solution through a silver reductor at the rate of 25 mL min i, and collect the filtrate in a 500 mL conical flask charged with 20 mL 0.5M iron(III) ammonium sulphate solution (prepared by dissolving the appropriate quantity of the analytical grade iron(III) salt in 0.5M sulphuric acid). Wash the reductor column with six 25 mL portions of 2M hydrochloric acid. Add 1 drop of ferroin indicator or 0.5 mL N-phenylanthranilic acid, and titrate with 0.1 M cerium(IV) sulphate solution. The end point is sharp, and the colour imparted by the Cu2+ ions does not interfere with the detection of the equivalence point. 

Physical constraints the processing times and the compatibility of tasks with different types of equipment. Colour, viscosity, grade, or aroma can be important factors that can affect the sequence of operations or campaigns and often are not taken into account in... 

These estimations can be documented by the well-known example with the diisopropylnaphthalene (DIPN) contamination in mixed RCP (RCP grade 1.02). This chemical substance comes from NCR carbonless copy paper and is in this mentioned RCP grade on an average level of 23 mg/kg TS [13], despite the fact that since several years those papers tried to be separated in the RCP grade sorted office paper , coloured letters and carbonless copy paper to reduce the DIPN concentration in mixed papers and board. 

The semi-fuse thus produced is waterproofed by passing through troughs of molten bitumen or by coating also with plastic.For higher grade safety fuse, a further countering of textile, such as cotton, is followed by a final varnish, which may be coloured for identification purposes. 

These enhance the appearance of the polymer, but play no role in the chemical, physical or mechanical properties of the base polymer. The main difficulty is that if the finished assembled article is made from different grades of the same polymer or from different polymers, then, particularly with different polymers, the combination must be uniform. For example, bathroom suites are often made from different materials, e.g., ceramics, baths (polyacrylates), trimmings (PVC, PP). The colorants therefore have to undergo different processing conditions and it is essential that in the final products the colour is the same. 

Microcrystalline wax is found worldwide as a constituent of crude oil. It is removed by solvent extraction and distillation. The colour varies, depending on grade, from white to brown black. It has many uses, including waterproofing paper and textiles, and as a sealant. This wax consists of a mixture of long chain (C41 C57) unsaturated hydrocarbons with an average molecular weight of 500 800. 

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