Appearance properties

Paint(s), 28-54-76. See also Coatings adhesion properties of, 28 73 analysis and testing of, 28 68-73 application and appearance properties of, 2860-63... 

The most widely utilized method to improve the appearance properties of an ASA resin, is to blend the ASA resin with a second resin, which can supplement the weak properties of former resin. 

Further, methods for producing a thermoplastic resin with good physical properties and appearance properties and weatherability as well, use a three component blend of ASA, PMMA, and polycarbonate) (20). 

Such thermoplastic resin compositions have excellent basic physical properties, weatherability and good appearance properties, such as scratch resistance, color stability and gloss. 

The optical appearance properties of a polymer, e.g. its clarity, gloss, dullness or turbidity, have no (direct) correlation with its chemical structure they are largely determined by physical factors. Commercially these properties are important. Two groups of appearance properties may be distinguished those connected with the volume (bulk) and those connected with the surface of the material. 

To understand plastics, one must first appreciate and accept the polymer chemist s ability too literally rearrange the molecular structure of the polymer (that becomes the plastic) to provide an almost infinite variety of compositions that differ in form, melt behavior, thermal behavior, appearance, properties, cost, and other behaviors. One must also approach the subject with a completely open mind that will accept all the contradictions that could make it difficult to pin common labels on the different families of plastics or even on the many various types within a single family that are reviewed in this book. Since each plastic has distinctive characteristics such as performance properties and/or fabricating procedures, they are labeled by their many different behaviors. This section highlights a few of the behaviors. Throughout this book many more behaviors are presented. 

Table 3. Thermal stability and appearance properties of polydimethylsiloxanes prepared using l,l,l,3,3,5,5,5-octakisdimettiylaniino-lX ,3X, -triphosphazen-l-ium hydroxide [P30H] as the catalyst and bis-dimethylvinylsilylphosphate as the neutralizing agent.

When chemistry was a young science and the number of known compounds was small, it was possible to memorize their names. Many of the names were derived from their physical appearance, properties, origin, or application—for example, milk of magnesia, laughing gas, limestone, caustic soda, lye, washing soda, and baking soda. 

The ability to perform precise, calibrated digital measurements is a welcome breakthrough for the science and technology of food appearance. As well as a new future for the measurement of appearance properties of three-dimensional materials it will be of great benefit for sensory assessment. Potential benefits include the development of on-screen panelhng and panel manipulation, communication and archiving. Another benefit will be the constraction of improved colour standards for panel use (see Chapter 14). 

The colonr sensitivity of the cone classes, the physical spacing of the cones within the retina, and the effects of chromatic aberration at the lens all contribute to what we call the spatiochromatic properties of the visual system. Whereas the CIE colour-matching functions describe the colour properties of the visual system reasonably adequately, if we wish to be able to analyse the colour-appearance properties of colour images or scenes then we need models that can incorporate the spatiochromatic properties of the visual system. In the next section some colour-appearance phenomena are described that demonstrate the intrinsic link between colour and spatial properties. 

The melt coloring of plastics is one of the most functional value added features a resin producer, compounder, or parts fabricator can impart to their products. It not only provides desired appearance properties that help sell the product, but it can also enhance several other properties, such as stability toward UV light. In addition, melt coloring usually eliminates the need for a separate, off-line, painting step. Overall manufacturing costs can thereby be reduced. 

Wood is a material with very differing properties different wood species, the site, the tree age, stemwood or knotwood, heartwood or sapwood offer an extremely broad range of biological, chemical, technological and appearance properties. 

Features Reduces baking temp, or baking time higher reactivity may aiso stabiiize vise, and enhance appearance Properties Yei. iow-visc. ciear iiq. dens. 1.19 g/cm (20 C) flash pt. > 65 C pH 6.2-7.0... 

Uses In solv. paints, coatings, rotogravure/flexographic/screen inks for coated paper and board, and inj. molded plastics Features Ultra brilliant disp. which delivers metalized appearance Properties Slurry controlled particle size vise. 840 cps Metalure L-54893 [Eckart-Werke]... 

Unocal Hydrocarbon Sales Mineral Seal oil is a highly refined, hydrotreated paraffinic light oil that is water-white in appearance. Properties include a very low odor, low aromatic content and low pour point. This product meets 21CFR178.3620(c). 

Thus far I have made six claims. It may be useful to summarize them. First, I have claimed that when an object x looksp F to an observer y, / is aware of x as having a certain property, a property that is invoked by the locution looksp F. I henceforth speak of this form of awareness as experiential awareness, and I say that the properties that are objects of experiential awareness, the properties that are invoked by predicates of the form looksp F, are appearance properties. Second, I have claimed that experiential awareness is representational in character. It constitutively involves a representation of an appearance property. Third, I have claimed that experiential representations have distinctive properties that set them apart from representations of other sorts. Thus, for example, unlike conceptual representations, experiential representations are analogue or quasi-analogue in... 

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