Silicon carbide abrasive paper

Roughen the surface using silicon carbide abrasive paper 400. 

Chemical Methods. Sherds were prepared for analysis by removing surface glazing and designs with a fine-grit silicon carbide abrasive paper. 

The specimen surface is often prepared before measurement to ensure a reproducible and known surface condition. Metallurgical surface preparation techniques are commonly used, these include wet grinding on silicon carbide abrasive papers, polishing with diamond or alumina media, electropolishing, chemical polishing, pickling or etching. 

One novel approach to the measurement of difficult solid samples is to use a silicon carbide abrasive paper (as mentioned in Section 3). The silicon carbide surface provides an irregular reflective surface that scatters all incident radiation. If the sample to be analyzed is rubbed against the abrasive surface, a small amount of sample is transferred to surface. In reality, the rubbing action distributes the sample as a thin film across the irregular, reflective surface. The sample, in turn, is measured directly on the surface by the use of a diffuse reflectance accessory note that this is really a trans-flectance measurement (measurement of a coating on a roughened surface) and not a classical diffuse reflectance measurement. Any spectral contributions of the silicon carbide can be removed by a ratio of the spectrum of a clean portion of the abrasive paper. 

Cylindrical test specimens, 3.0mm in diameter and 5.7mm. long were prepared by pol3m[ierizing the composite resins in a split stainless steel mold. Fifteen minutes after placement in the mold, the specimen ends were ground flat and parallel with 240 grit silicon carbide abrasive paper. Within one-half hour after mixing, the specimens were removed from the mold, placed in 37°C water, and stored for two weeks prior to testing. 

Silicon carbide waterproof paper n. Hard, sharp, coated abrasive particularly suited for lacquer, plastics and non-ferrous metals, also for wet sanding primes, undercoats and between coats on wood and metal using water, oil, or other lubricants. See coated abrasive. 

Coated abrasives consist of a flexible backing on which films of adhesive hold a coating of abrasive grains. The backing may be paper, cloth, open-mesh cloth, vulcanized fiber (a specially treated cotton rag base paper), or any combination of these materials. The abrasives most generally used are fused aluminum oxide, sol-gel alumina, alnmina-zirconia. silicon carbide, garnet, emeiy, and flint. 

To examine the effect of the inner layer, the oxidation of "as received" deposit was compared with that of material from which the inner layer had been removed by abrasion on silicon carbide papers,... 

Vigorous abrasion of specimens should be avoided, since hydrogen absorption by the specimen may result. It has been found that abrasion of a mild steel surface by 120 grade silicon carbide paper resulted in... 

In BS903, Part A9, the ISO method is one of four standard tests, the others being the DuPont, the Akron, and the Taber or rotary platform double head type machine. Like the ISO method, the DuPont test is one of continuous abrasion against a replaceable abrasive paper, this time of silicon carbide rather than of aluminum oxide, but there is no built-in procedure to avoid abrasive smearing and progressive changes in abrasive power other than a rotation of test pieces to even out differences. The Akron method involves the wear... 

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