Soap scum

Soap scum is an informal term for the white solid that results from the addition of soap to hard water. Hard water contains calcium or magnesium ions, which react with the fatty acid component of soap to give what are technically called lime soaps:

In this reaction, the sodium ion in soap is replaced by calcium ions.

Lime soaps are ineffective in washing dishes or clothes or hair. Thus, hard water needs large amounts of soap to form a lather, and in hair washing, the soap scum sticks in the hair. Synthetic detergents are less susceptible to the effects of hard water.

Although soap scum is generally considered a nuisance, its components, calcium stearate and magnesium stearate when produced intentionally, are very useful materials in the polymer industry and in pharmaceutical industry.

Soap scum on vinyl shower curtains has been reported to constitute a rich microbial biofilm, containing potentially pathogenic bacteria.

See also

References

Scum

Scum or S.C.U.M. may refer to:

Scum

Games and sport

Books, film and TV

Scum (Anti-Nowhere League album)

Scum is the third studio album by English punk rock band the Anti-Nowhere League and the first album of new material released since the original band's breakup ten years previously. A new lineup is featured, with only lead singer Animal and guitarist Magoo remaining from the band which recorded the much-criticised The Perfect Crime LP in 1987. The album also marks a return to the ANL's "classic" punk-metal sound.

Track listing

All songs written by Animal/Magoo, except where noted.

Personnel

Scum (Napalm Death album)

Scum is the debut album by English grindcore band Napalm Death. It was released on 1 July 1987 through Earache Records.

Side A of Scum was originally recorded for £50.00 at Rich Bitch studio (Birmingham, England) in August 1986. It was intended to form part of a split release with English crossover thrash band Atavistic on Manic Ears (Bristol, England). After an extensive line-up change, the second half of Scum was recorded in May 1987 at Rich Bitch studio. The two sides were combined and released as a single album. Only drummer Mick Harris played on both sides of the album.

The first pressing of the CD (1988) came as a 54-track CD, which included the From Enslavement to Obliteration album and four bonus tracks. In 1994, the first two albums were re-released separately. A remastered version was released on 27 January 2012. The album cover was designed by Bill Steer's Carcass bandmate Jeffrey Walker. The album covers came in varied colours: orange, gold, green, blue, and yellow. The song "You Suffer" was listed in the Guinness Book of Records as the world's shortest song; the track is precisely 1.316 seconds long.

Soap

In chemistry, soap is a salt of a fatty acid. Consumers mainly use soaps as surfactants for washing, bathing, and cleaning, but they are also used in textile spinning and are important components of lubricants.

Soaps for cleansing are obtained by treating vegetable or animal oils and fats with a strongly alkaline solution. Fats and oils are composed of triglycerides; three molecules of fatty acids attach to a single molecule of glycerol. The alkaline solution, which is often called lye (although the term "lye soap" refers almost exclusively to soaps made with sodium hydroxide), brings about a chemical reaction known as saponification.

In this reaction, the triglyceride fats first hydrolyze into free fatty acids, and then these combine with the alkali to form crude soap: an amalgam of various soap salts, excess fat or alkali, water, and liberated glycerol (glycerin). The glycerin, a useful by-product, can remain in the soap product as a softening agent, or be isolated for other uses.

Soaps are key components of most lubricating greases, which are usually emulsions of calcium soap or lithium soap and mineral oil. These calcium- and lithium-based greases are widely used. Many other metallic soaps are also useful, including those of aluminium, sodium, and mixtures of them. Such soaps are also used as thickeners to increase the viscosity of oils. In ancient times, lubricating greases were made by the addition of lime to olive oil.

Soap (Melanie Martinez song)

"Soap" is a song by Melanie Martinez, featured on her debut studio album, Cry Baby. The song was released July 10, 2015, along with a music video the same day. It is set to impact Alternative radio outlets according to Warner Music.

Background and compostion

"Soap" was premiered exclusively on ELLE magazine's website on July 10, 2015. The electropop,indie pop and bubblegum pop track was released as the second single from Melanie's debut album, "Cry Baby".

In the interview with ELLE, Melanie described the song, "Soap was written about my current boyfriend when we were first talking, I felt too scared to say how I felt about him and thought if I told him it'd be like throwing a toaster in his bath. So I washed my mouth out with soap. I think anyone can really relate to this song. I'm sure there was a time in everyone's life where they felt too scared to say how they felt so they 'washed their mouth out with soap'". She continued, "Everyone is allowed to be vulnerable. I think women and men and dogs and cats and ants and aliens can all express themselves and be vulnerable".

Soap (disambiguation)

Soap is a surfactant cleaning compound used for personal or other cleaning.

Soap may also refer to: