Blemishes

The eady juice industry was largely a salvage operation. The principal source of raw material was misshapen, poorly colored, or skin blemished fmit unsuitable for the fresh, canned, or frozen fmit market. In the 1990s, raw materials are selected for suitabiUty for juice production, except for apple juice production which still uses much cull fmit (4). 

Buffiag may be only to remove surface blemishes such as iasect bites or minor healed scratches, or the buffing may be to make a suede surface. Newbuck is a light suedeiag of the grain of catde hide leather. Sheepskin suede is usually buffed on the flesh side of the skin. SpHts may be buffed to make buck shoe leather or heavy garment leather, often called ranch hide. The variations depend on the desires of the customer. 

Quality levels are the result of a ratio of parts defective to parts produced. The current trend is to use parts per million (ppm) but this is not always practical for some processes. Painting processes for instance cannot achieve blemish-free surfaces in the order of one blemish per million parts painted ... 

Segregation is not only limited to the product but also to the containers and tools used with the product. Particles left in containers and on tools, no matter how small, can cause blemishes in paint and other finishes, as well as violate health and safety regulations. If these are such risks in your manufacturing process, procedures need to be put in place that will prevent product mixing. 

Makel, m. spot, blemish, flaw, makellos, a. spotless, flawless, unblemished. Maker, m. maul, sledge. 

The surface condition of the object to be coated requires specifying extremely carefully if a high standard of finish is required, because powder coating tends to faithfully reflect surface contours and blemishes. 

With most woods, new surfaces first of all darken when exposed to light, particularly with teak and afrormosia, where any masking of portions of the surfaces of furniture can give blemishes. After full colour development, strong sunshine bleaches most woods to a common brown colour. 

Colour change Caused by exposure to light, the effect is greatest with hardwoods and is important in furniture, panelling and joinery any masked areas become blemishes. Strong sunshine bleaches most woods to a common brown colour. 

Jetting Jetting is a condition that results when the mold design has no immediate impediment to flow and the plastics is ejected into a relatively large open volume. This jetted material becomes a weak point on the product and a surface blemish that is difficult to conceal. 

Cosmetic Standards. Over the last two decades, the U.S. Food and Drug Administration (FDA) has been lowering the tolerance levels for Insects and insect parts allowed in and on fresh and processed foods (14). Concurrently consumers have sought "more perfect," pest-free produce. To achieve this, farmers have Increased the quantities of pesticide they applied to crops. Although the presence of small amounts of insect parts in such products as catsup and apple sauce, or blemishes on oranges pose no health risk, these stringent standards have stood for many years. 

Scars inflammatory acne can result in permanent scarring that ranges from small depressed pits to large elevated blemishes Hyperpigmentation inflammatory acne may cause hyperpigmentation of the skin that can last for weeks to months... 

Supermarkets have a carcass specification for weight conformation and fat content, which ensures that the meat bought is commercially viable and provides the end product that the consumer requires. The supermarkets are able to insist on their own quality regulations for produce, because they are so dominant in the market place. Until such time as organic farmers can co-operate and become equally powerful, they will have to abide by the supermarket standards. At present, they seem to be under pressure to produce regularly shaped and sized, blemish-free products, on a mass scale, available all-year-round and often transported long distances. Despite these pressures, however, British organic farmers are not contract farmers to the extent that many conventional farmers are. 

Diaphoretic. Because it promotes perspiration by relaxing the pores, elder is a traditional remedy to help the body release toxins through the skin. It increases blood circulation and body heat near the surface of the skin. It has been used to treat blemishes, acne, herpes, psoriasis, measles and chicken pox. Parts used flowers, berries, leaves. 

In this case study, an automotive supplier was facing an issue of surface blemishes on sun visor arms. 

Portions of the sun visor arms used in automobiles can be manufactured from glass-filled thermoplastic polymers. Several visor arms contained visible blemishes on the surface. Typically, the steel insert of the visor arm is overmolded with the glass-filled thermoplastic polymer. Manufacturers sometimes utilize striations on the steel insert to provide a mechanical interlock with the over-molded thermoplastic polymer. However, in an improperly controlled environment, the mechanical process that produces the striations can also be the source of contamination and cause surface blemishes in the final product. 

To diagnose the surface blemish problem several analytical techniques were employed. First, the samples were photo-documented. Since an aesthetic problem is by definition a problem with the visual appearance of an item, it is important to ascertain if all the defects are different or of the same nature. With close inspection, the sun visor arms were found to contain two distinct types of defects. Figure 1(a) shows what was called the Type A defect and Figure 1(b) shows the so-called Type B defect. These images were acquired using a stereomicroscope coupled with a digital camera. 

Fruits are still sold and consumed mainly fresh, essentially as they are picked from the tree. On the tree, however, fruit (e.g. apples) remain exposed to the attacks of diseases, pests and climatic stress factors during 130-160 days of the year. Given the often low tolerance among consumers for even minor blemishes on fruit, it is a complex and laborious task for fruit growers to keep the fruit in a visibly attractive and immaculate state... 

In moulds for complex product shapes it can be advantageous to provide vacuum extraction to the cavities so that air and evolved gases can be removed from the mould cavity, before and during vulcanisation to ensure complete cavity fdling, and a product without air (gas) blemishes. 

Diseases are dependent on several factors. Some diseases are rare and some are almost always present but cause such minor effects that the blemishes are actually accepted as characteristic of normal trees. Often coffee diseases are not thought of until an especially acute and virulent attack brings them to popular attention. When coffee prices rise there is more interest in the growing of the crop. 

---