bleaching of naturally pigmented cashmere with hydrogen peroxide
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bleaching of naturally pigmented cashmere with hydrogen peroxide An investigation of a process for bleaching the naturally pigmented form of the Keratinous fibre cashmere with hydrogen peroxide to produce a material comparable with unbleached white cashmere. by Alan Stanley Little

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Published by The author in Bradford .
Written in English


Book details:

Edition Notes

Ph.D. Thesis. Typescript.

SeriesTheses
The Physical Object
Pagination103p.
Number of Pages103
ID Numbers
Open LibraryOL21504744M

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  A closed system bleaching apparatus was designed to determine the kinetics and effects of various factors on alkaline hydrogen peroxide bleaching of textile cellulose fabrics. It was confirmed that perhydroxyl anion is the primary bleaching moiety in alkaline hydrogen peroxide systems. The use of the apparatus in the measurement of fabric color, waste oxygen, and the subsequent calculation of Cited by:   Hydrogen peroxide bleaching strips the natural pigment from your hair, making it just about as damaging as hair dye. Lemons have long been known for their bleaching qualities, and the essential oil has been found to possess the same properties. Apple cider vinegar helps with lightening, but also leaves a shine and works to strengthen your hair.   But wood bleach lets you remove color from wood. You'll find three kinds of products marketed as wood bleaches. But only one will remove the natural color from wood: a two-part wood bleach of sodium hydroxide (caustic soda) and hydrogen peroxide. Other wood bleaches are chlorine bleach and oxalic acid.   According to statistics, there is an unhealthy obsession with “fair” skin, especially among African and Asian women. UN data says that 40% of African women bleach their skin ().By , the market of skin-lightening and whitening products is estimated to be worth $ billion ().However, little do you realize that you are actually damaging your skin by using chemical bleaches.

The article points out that hydrogen peroxide is a popular ingredient in many skin care products. Its bleaching ability is well known for both industrial and cosmetic usage. The hydrogen peroxide bottles sold in drugstores have a 3 percent to percent solution that is approved by the Food and Drug Administration for use on the skin.   In terms of personal hygiene, there are so many fantastic applications for hydrogen peroxide. From a mildly bleaching tooth paste base (along with baking soda) or an ear disinfectant to a highly deodorizing foot bath or full-on bathtub soak (using no more than 1 cup of 35% hydrogen peroxide per bath), this natural body care staple has it goin. contain small, uncolored dyes that combine with hydrogen peroxide to form larger, permanent dye molecules within the cortex. soap cap combination of equal parts of a prepared permanent color mixture and shampoo used during the last five minutes of a haircolor service and worked through the hair to refresh the ends. 1) the darker the natural hair color, the more melanin it has. The more melanin it has, the longer it takes to lighten the color. 2) the amount of time needed to lighten natural color is also influenced by the hair's porosity. 3) tone influences the length of time necessary to lighten the natural haircolor.

Hydrogen peroxide oxidizes the hair's pigment, stripping away the melanin and, as a result, its color. A single bleaching can lighten your hair by as many as eight shades. Use a home hair-bleaching kit or turn to your stylist for a professional application. Depending on how light you want your hair, the process takes 30 to 45 minutes. Oftentimes, color is added after the bleaching process. Side Effects. . and hydrogen peroxide (H 2 O 2) [1]. 2Na 2 CO H 2 O 2(aq) → 2Na 2 CO 3 (aq) + 3H 2 O 2 (aq) The released hydrogen peroxide then becomes the active oxidizing agent, which removes the stain by breaking down the colored section of the chromophores. The main constituent of oxygen bleach is hydrogen peroxide. It is a polar molecule and water. Removing the natural color of wood is best done with the two-part peroxide bleaches. These are available as "A/B" bleaches sold in most paint and hardware stores. The most common way to apply this product is to wet the wood thoroughly with part A (sodium hydroxide) then immediately apply part B (hydrogen peroxide). Because I have naturally reddish tones to my hair and try to keep it looking natural. 3. Peroxide. Begin by diluting the hydrogen peroxide half and half with water. Next, apply as directed above and test after minutes. Note that peroxide will lighten quickly without the worry of .