Emery paper

Whenever a second coat of paint is required for better adhesion of paint, it is better to rub the painted surface of the first coat w ith i finer emery paper... 

Final surface making Rub the putty, if applied, with water and slightly coarse emery paper No. 180-220. It is better to rub... 

Tungsten (rod) [7440-33-7] M 183.6. m 3410 , b 5900 , d 19.0. Cleaned with cone NaOH solution, rubbed with very fine emery paper until its surface was bright, washed with previously boiled and cooled conductivity water and dried with filter paper. 

Figures 4 and 5 show significant differences in thoron progeny activity plated-out on cotton cloth and emery paper (Figure 4), and cotton cloth and Fiberglas filters (Figure 5). Differences between the other pair of materials were less pronounced or difficult to ascertain (<7 ).

A pan 2 cm. high and 13 cm. in diameter is suitable for a run of this size. Any oxide coat should be removed by heating to redness, cooling, and polishing with emery paper otherwise the product is deeply colored where it comes into contact with the pan. The same pan may be used repeatedly without further treatment other than cleaning and drying. 

Use the emery paper or sandpaper to polish small strips of zinc metal. Place a piece of Zn metal in each row C well that contains solution. 

Use emery paper or sandpaper to polish the magnesium ribbon until it is shiny. Use scissors to cut the magnesium into four 1-cm pieces. 

The embedded platinum was abraded off using emery papers until the cut face reached the center of the crystal. Then it was polished with the outer shell using finer emery papers and aluminum powders finm 1 lun to... 

Adhesive Bonding Technique. Standard procedures for preparing adhesive bond specimens were used. The composite was initially sanded with 240 grit emery paper and then thoroughly rinsed with methylene chloride. Steel substrates were rinsed thoroughly with methylene chloride. Bonds were prepared as one inch overlap shear specimens bond thickness was 0.75 mm. Bond thickness was defined using 1.5 mm long wires of the appropriate thickness. 

Fig. 30. Effect of surface texture on nucleate boiling. Ether was boiled on a nickel plate polished with different grades of emery paper. The pressure was atmospheric. Typical data are given for one curve only (C4).

Reaction of Aluminium with Oxygen and Water. (The experiment is prepared by one student who demonstrates it to the class.) Clean two aluminium plates from aluminium oxide with emery paper and next from grease by boiling them in a small amount of ethanol. Put the plates into a porcelain bowl in a tray with high sides and pour a few drops of a mercury(II) nitrate solution onto them. After five minutes, wash the plates with water, put one of them on a watch glass, and leave it in the air. Immerse the other one into a beaker with water. Observe what occurs and explain these phenomena. Write the equations of the reactions. 

Lubricate the ground-glass joints in the apparatus with a concentrated sulphuric acid solution. Clean a piece of metallic aluminium with emery paper, make 10-12 g of shavings from it, and put it into flask 1. Pour 30 ml of dry bromine into dropping funnel 2. This amount of bromine is not sufficient for the aluminium to enter into the reaction completely (why is excess aluminium taken )... 

Immerse a copper plate or wire cleaned with emery paper into a 0.01 N solution of silver nitrate. What is observed What place does silver occupy in the electrochemical series of the metals ... 

Use of Zinc Chloride in Soldering. Glean two copper wire ends with emery paper and place them on a sheet of asbestos so that they are in contact with each other. Put 1-2 g of metallic tin on the asbestos sheet. Heat an electrical soldering iron until it acquires a dark red glow, touch the tin with it, and transfer the drop of molten tin to the place of contact of the copper wires. What do you observe Did the tin solder the ends of the wires ... 

Preparation of Metal Surfaces for Soldering. Prior to soldering, thoroughly clean the surface of the metal with a file or emery paper. Such surface cleaning is not needed when soldering tinplate. Large metallic surfaces to be soldered should first be tinned. To do this, heat the metal article on the flame of a burner (300-350 °C), spread ammonium chloride over the surface to be soldered (for what purpose ), put a piece of tin on it, and spread the tin over the metal surface with an asbestos wad. 

EPF (Emery Paper Figure), Brit, test for detn of friction sensitiveness of explosives. See under Friction Sensitiveness Determinations in Vol 6 of Encycl... 

Whether the GC is mounted or not, the most common polishing procedure involves a series of abrasives used as slurries on a commercial fabric polishing cloth. The as-received electrode or GC piece is first sanded on 600 grit emery paper to remove gross surface defects and impurities. In most cases, each polishing step involves a circular motion for a few minutes, with the objective being uniform roughness over the electrode surface. The sandpaper is followed by... 

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