Waxed papers

Bearings should not be left exposed overnight. Coat bearings with clean oil and cover them with clean oil or wax paper. 

Keep bearings covered with oil or wax paper when not in use. 

Rates of transmission may be affected by creasing, scoring, etc. especially for waxed papers, and of course also strongly depend on thickness. Information can be obtained from suppliers of materials, or measurements can be made according to a method given in BS 3177 1959 which includes a table... 

Paper is one of the oldest and most commonly used packaging materials. Generally it is used to keep a product clean and for mechanical strength when combined with other materials. It does not protect a product from atmospheric change, but only from mechanical contaminants such as dirt. Coated papers are much more functional. Waxed papers fall into this category and provide much better protection from moisture and, in some cases, from gas (oxygen) transmission. 

In fruit penetration studies 8 pounds of fruit were first thoroughly scrubbed with warm 10% trisodium phosphate solution and then rinsed thoroughly with distilled water. Citrus fruits, if depth of penetration into the peel was of interest, were peeled in longitudinal sections with a buttonhook peeler and the albedo or white portion was separated from the flavedo or colored portion. The separated peel was placed in pie tins lined with waxed paper and dried in a forced draft oven at 65° C. for 16 hours. The dried peel was then crushed and steeped for 48 hours in a measured volume of benzene sufficient to cover the sample. If, on the other hand, only the total amount of DDT in the peel was of interest, the fruit was halved and juiced on a power juicer. The pulp was removed, the peel sliced, and the sample dried and treated as before. Thin-skinned fruits, such as apples, pears, and avocados, were peeled with a vegetable peeler, cores or seeds were removed, and the pulp was sliced in thin slices. Pulp and peel were then dried and treated in the same way as the citrus peel. The steeping completed, the samples were filtered through Sharkskin filter paper and the volume of benzene recovered was noted. 

Leaves are stripped for 30 minutes in the usual 2-quart wide-mouthed Mason jars. Instead of a waxed paper gasket, however, 2 squares of No. 300 M.S.T. cellophane topped by a square of white nylon are used, as the benzene would disintegrate the wax paper during this longer stripping period. The entire 250 ml. of benzene are added at once, the... 

The dry material is readily ignited, bums very rapidly and is moderately sensitive to heat, shock, friction or contact with combustible materials. When heated above its m.p. (103-105°C), instantaneous and explosive decomposition occurs without flame, but the decomposition products are flammable. If under confinement (or in large bulk), decomposition may be violently explosive [1], An explosion which occurred when a screw-capped bottle of the peroxide was opened was attributed to friction initiating a mixture of peroxide and organic dust in the cap threads [2], Waxed paper tubs are recommended to store this and other sensitive solids [3], Crystallisation of the peroxide from hot chloroform solution involves a high risk of explosion. Precipitation from cold chloroform solution by methanol is safer [4], Water- or plasticiser-containing pastes of dibenzoyl peroxide are much safer for industrial use. 

One positive factor in biscuit packaging is that there are now available a whole range of polymers that act as both a moisture and a vapour barrier. These films offer much better protection than the waxed paper that was once used. The other improvement is the use of high speed highly mechanised packing machinery. 

Place a square of waxed paper on your lab surface. Plan where on the waxed paper you will place each of the 5 drops that you will test. The... 

Crumple up the waxed paper and place it in the container assigned by your teacher. 

Why does water form beaded droplets on surfaces such as leaves, waxed car hoods, and waxed paper ... 

Try putting a drop of water on wax paper or glass and look at it closely. Does it look like it has a skin There really isn t a skin what you re seeing is surface tension. The molecules in water are attracted to each other, like tiny magnets, because the hydrogen atom in one molecule is attracted to the oxygen atom in another molecule. Every water molecule feels pulled towards the others, so the water molecules shrink away from the surface and cling to each other. 

Formaldehyde from smoking, waxed paper, shampoo, cosmetics, and medicine products, etc. ... 

In artists studios, which serve as a model for many of the interiors, there were generally one or two windows, usually on the north side of the room to keep sunhght from directly hitting the canvas. Some artists used wax paper or curtains to block out light or manipulate where it would fall. See W. Martin Boschloo. 

Hand Grenade and 12 blocks l A" by %" of 66.6/33.3—RDX/A1 compn, each wrapped in waxed paper. It could be used as an A/Tk Mine when fuzed with an armed grenade or as an A/P Mine or Booby Trap when armed with pull or tension detonator (p 219, Fig 165) Air-Strip Land Mine consisted of 31 100-kg bombs stacked around PA blocks in which electrical detonators were inserted. The ensemble was under a turf-covered piece of sheet iron that would close the circle and fire the charge if the iron were lifted or depressed. A clockwork was also inserted to fire the chge if the iron were not depressed (p 220, Fig 166, upper half)... 

Accdg to Ref 10, commercial Gelignite 60" was used in demolition charges weighing 4 or 1 lA oz, wrapped in wax paper. Gelignites "60 and SO were used in Australian Demolition Cartridges weighing 3lA oz... 

As soon as crude was produced, wax became an important product. Along with kerosene it helped in the first big job of petroleum, that of lighting. Even as late as 1939 candles accounted for 64% of the world-wide use of wax (31). In this country particularly, this use has now been subordinated to that of waxing paper, for which 80% of the United States production is used (17, 47). 

Ballistite is virtually non-hygroscopic and is therefore transported and stored in tightly closed wooden boxes, lined with cloth or waxed paper with a lid fixed with brass screws. 

Both of these expls passed the Brit Buxton Test(Ref 10). Barnett(Ref 8) gives for ammonites No 1 and No 5 the same compn AN 75, TNN 5, NaCl 20% plus 0.5% moisture and for ammonite No 4 AN 66, Na nitrate 10, DNN 4 KC1 20%, plus 0.5% moisture. The only difference betn the No 1 and No 5 was that the latter was put up in waxed paper and the former in metal foil cases. Molina(Ref 9a) gives compn of Ital ammonite No 1 as AN 88, DNT 3, vegetable flour 6 NG 3%, plus traces of DPhA... 

Because of their ability to form relatively thin continuous films in conjection with their hydro-phobic nature, waxes are used extensively as a protective coating, primarily as water/moisture barriers. Most common example of this is in the use of household wax paper . This material is usually used to wrap sandwichs so that the bread and filling do not dry out. Here it is desired to keep the moisture in. Waxes are also applied in the emulified form to the exterior painted surface of our automobiles. They are utilized to prevent both water/moisture and air from contacting the painted surface. Such barriers prevent oxidation and prolong the life of the painted surface... 

During WWII, Japanese artillery (Ref 36) contained a maincharge (TNT, Trinitroanisole, Picric Acid) which was cast in individual blocks and sealed in waxed paper containers. These containers, in turn, were encased in a heavy cotton flannel bag and sealed in the projectile with paraffin. It is presumed that this assembly was used to facilitate loading, to retain any exudation from the expl charge, and to protect the expl charge by providing an inert material to fill any voids in the interior of the projectile... 

Wet nitrocellulose containing 20-40% of water is packed in galvanized iron drums or in semi-hermetic wooden boxes lined with zinc sheet or sometimes only with paraffin wax paper. Rubber gaskets are fitted under the lids. The box lids are fastened down by means of brass screws. Nitrocellulose packaged in this way is accepted for railway transport in separate Waggons. 

Protection of ammonium nitrate against moisture by storage under completely dry conditions, e.g. by means of suitable water-proof packaging, e.g. waxed paper. 

A camera can be used to focus an image on wax paper as well as on photographic film. 

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