Search for tag: "metals"

live lecture 3/15/2021: world history of metals

From  Lauren Fair 0 likes 6 plays 0  

live lecture 3/10/2021: metals in early america with Ann Wagner

From  Lauren Fair 0 likes 3 plays 0  

at-home practicum: cleaning iron

This video demonstrates the following mechanical cleaning methods on a corroded ferrous object: mineral spirits; micro scalpel; and 0000 steel wool with mineral spirits.

From  Lauren Fair 0 likes 4 plays 0  

at-home practicum: polishing copper alloy

This video demonstrates the following polishing methods on an oxidized copper alloy object: slurry of water and calcium carbonate; slurry of water and aluminum oxide; and MicroMesh polishing cloth.

From  Lauren Fair 0 likes 8 plays 0  

at-home practicum: polishing silver

This video demonstrates the following polishing methods on a tarnished silver object: Mars Staedtler eraser; slurry of water and calcium carbonate; slurry of water and aluminum oxide; and extremely…

From  Lauren Fair 0 likes 4 plays 0  

live lecture 3/8/2021: metal technology and manufacture

From  Lauren Fair 0 likes 11 plays 0  

fixing drips

Drips often form when brush- or spray-lacquering, but these can be easily fixed if you catch them quickly enough.

From  Lauren Fair 0 likes 5 plays 0  

spray lacquering

Spray lacquering a silver plate with 1:2 Agateen Lacquer #27 (nitrocellulose) / Agateen Lacquer Thinner #1 with 0.025 wt.% coumarin 6 (UV-fluorescent) dye additive.

From  Lauren Fair 0 likes 15 plays 0  

brush lacquering

Brush lacquering a silver fork with 1:1 Agateen Lacquer #27 (nitrocellulose) / Agateen Lacquer Thinner #1 with 0.025 wt.% coumarin 6 (UV-fluorescent) dye additive.

From  Lauren Fair 0 likes 11 plays 0  

polishing silver

Mechanical polishing of silver offers the greatest amount of control as compared to other cleaning methods, such as chemical dips or electrolytic setups. Lab grade (chemically pure, homogenous…

From  Lauren Fair 0 likes 11 plays 0  

coating removal with solvent poultice

On silver objects that do not have organic or other solvent-sensitive components but are coated with cellulose nitrate lacquer, poultices with cotton pads soaked in acetone solvent can safely and…

From  Lauren Fair 0 likes 5 plays 0  

lifting lacquer during steam removal

The use of pressurized steam to remove cellulose nitrate lacquer from non-plated silver causes it to lift, sometimes in large sheets.

From  Lauren Fair 0 likes 5 plays 0  

coating removal with pressurized steam

On silver objects that are not plated but are coated with cellulose nitrate lacquer, pressurized steam from a handheld dental steamer can safely and effectively remove the previously applied coating.

From  Lauren Fair 0 likes 6 plays 0  

washing uncoated silver

Washing silver in a bath of dilute nonionic surfactant helps soften some tarnish and remove polish residues. Rinse in a bath of clean water.

From  Lauren Fair 0 likes 4 plays 0  

Recording from Oct 20, 2016

Recorded via UD Capture in Smith 120

From  Dana Chatellier 0 likes 34 plays 0  

chem103-070-20190926-153000.mp4

Video Created by UD Capture Classroom Recording in Smith 120 on 2019-09-26 15:30:00.

From  Dana Chatellier 0 likes 86 plays 0