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The presence of oil on a clock can cause damage, particularly corrosion when metal clock components are touched. Other pollutants can cause oxidization and tarnishing in metal clocks. The cleaning agents used to remove pollutants can result in a chemical reaction with previously used lubricants or cleaning agents or with the materials of the clock.
"Clean any dirt or debris off the surface, scuff or sand the original finish to dull it down and provide a good profile, clean the dust from sanding, and allow the substrate to dry properly before ...
The damage on the metal sheet or characteristic pattern illustrates an "uneven surface," a change in the sheet material's plastic behavior and involves a larger deformed volume compared to mere flattening of the surface oxides. Galling is a form of wear caused by adhesion between sliding surfaces.
The luminous paint used on the dials contained a mixture of zinc sulfide activated with silver, and powdered radium, a product that the Radium Dial Company named Luma. However, unlike the US Radium Corporation, Radium Dial Company was specifically set up to only paint dials, and no other radium processing took place at the premises.
A main part of the clock case was given to Pittington Hallgarth Church in 1847. [3] The clock mechanism was fixed in a blank window. Parts of it were rediscovered in 1936 and Dean Cyril Alington launched a campaign to restore it. Mr. J. Armstrong from London, an expert in paint, was engaged in removing the layers of paint down to the original ...
The chromate coating acts as paint does, protecting the zinc from white corrosion, thus making the part considerably more durable, depending on the chromate layer's thickness. [ 8 ] [ 9 ] [ 10 ] The protective effect of chromate coatings on zinc is indicated by color, progressing from clear/blue to yellow, gold, olive drab and black.
Woodcut of medieval clockmaker, 1568 Lateral view of a Timothy Mason longcase clock movement with striking mechanism, c. 1730. A clockmaker is an artisan who makes and/or repairs clocks. Since almost all clocks are now factory-made, most modern clockmakers only repair clocks.
Craquelure in the Mona Lisa, with a typical "Italian" pattern of small rectangular blocks Age craquelure in pottery. Craquelure (French: craquelure; Italian: crettatura) is a fine pattern of dense cracking formed on the surface of materials. It can be a result of drying, shock, aging, intentional patterning, or a combination of all four.