Mirror, mirrors finish

It should be recognized that surface finish can be more than just a cosmetic standard. It also affects product quality, mold or die cost, and delivery time of tools and/or products. The surface can be used not only to enhance clarity for the sake of appearance but to hide surface defects such as sink and parting marks. The Society of Plastics Engi-neers/Society of Plastics Industries standards range from a No. 1 mirror finish to a No. 6 grit blast finish. A mold finish comparison kit consisting of six hardened tool steel pieces and... 

Preparation of the Pt(lll) Single-Crystal Electrode. The Pt single-crystal electrode was prepared according to the procedure developed by Clavilier (7) and oriented using the methodology of Hamelin (8). It was subsequently polished with alumina to a mirror-like finish. The quahty of the Pt(l 11) surface was verified by recording CV... 

Bonilla et al. (1965) studied the effect of parallel scratches on a polished stainless steel plate when boiling mercury with a small portion of sodium as wetting agent. The mirror-finished stainless steel plate was scored by a tempered steel nee-... 

Figure 2.33 Boiling curves for acetone boiling on Teflon-coated, mirror-finished, and rough surfaces. (From Ramilison and Lienhard, 1987. Copyright 1987 by American Society of Mechanical Engineers, New York. Reprinted with permission.)...

Electrochemical equipment and cells used for these investigations have also been described previously. (8.9 ) Polycrystalline Ag (Johnson Matthey, 99.9%) was mechanically polished with alumina (Buehler) to a mirror finish and sonicated in triply distilled H20 before each run. All potentials were measured and are reported versus a saturated calomel reference electrode (SCE). 

The polycrystalline platinum electrode was mounted in Kel>F resin and polished with a scries of alumina powders down to 0.05, resulting mirror finish. The apparent surface area was 1.85 cm. The electrode was washed with fuming sulfuric add and rinsed with ultra pure water prior to each measurement. 

The techniques used in this stage of the work were all IR spectroscopy using a Perkin-Elmer spectrometer 599 and appropriate attachments. Conventional transmission through a sodium chloride cell of path length 0.1 mm, and multiple specular reflectance from aluminium films with a mirror finish were both used. 

Allow the resin to cure for 24 h. Polish off the excess resin with sand paper to expose the gold surface. Once the surface is exposed, continue polishing with 1.0 pm alumina slurry, followed by 0.3 and 0.05 pm alumina slurry on microcloth pads (from Buehler, IL, USA) to a mirror-like finish (about 3 min each). 

Polish the surface of the GEC electrode prior to each use, first with abrasive paper, and then with alumina paper (polishing strips 301044-001, Orion) to give a smooth mirror finish with a fresh renewable surface. When not in use, the electrodes can be stored in a dried place at room temperature. 

Dewars. Dewars are the best and most commonly used cryogenic containers in the laboratory. Their ability to maintain a temperature is exceptional. They are used in most labs where dry ice is found and in all labs where liquid nitrogen is found. Dewars are also found in many lunch boxes as Thermos bottles. Dewars are typically identifiable as a hollow-wall glass container with a mirror-like finish. That mirror finish is a very accurate description because the silver coating on Dewars is the same as is used on mirrors. 

These steel precision works of art have at least a mirror finish on the melt flow channel orifice surfaces. The slightest minute scratches can produce flaws in the extruded products. Great care must be used during their installation, operation, removal, cleaning, and storage. When designing them the target is to use as few parts as possible. The dies should be easily lifted for installation or maintenance, easily disassembled, easily cleaned, and easily reassembled. 

In 2004, Treofan GmbH developed a metallised version of its PLA biodegradable film that reduces permeability aromas, oxygen and water. The metallised Biophan PLA film is said to be suitable for packaging fatty foods such as butter and cheese, as well as for confectionery, where the mirror-like finish adds a decorative feature to the barrier properties. The metallised film meets both EU and US, Food Drug Administration food contact requirements. 

Tortoiseshell takes a good polish, giving an almost mirror finish. This dulls with time. 

Platinum plates with 1 cm area per side were metallographically polished to a mirror finish, rinsed with distilled water, and flamed just before exposure to sea water for either ellipsometric or contact angle measurements. The platinum plates were wetted with photo-oxidized sea water before immersing into experimental sea water, so that passage of the surface through the air—sea water interface would not cause any film present there to be transferred to the plate. For the same reason plates removed from the experimental sea water were immediately immersed while still visibly wet in photo-oxidized sea water and then rinsed. 

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