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  2. Henna - Wikipedia

    en.wikipedia.org/wiki/Henna

    Soles and palms have the thickest layer of skin and so take up the most lawsone, and take it to the greatest depth, so that hands and feet will have the darkest and most long-lasting stains. Some also believe that steaming or warming the henna pattern will darken the stain, either during the time the paste is still on the skin, or after the ...

  3. Leather - Wikipedia

    en.wikipedia.org/wiki/Leather

    Leather is a strong, flexible and durable material obtained from the tanning, or chemical treatment, of animal skins and hides to prevent decay.The most common leathers come from cattle, sheep, goats, equine animals, buffalo, pigs and hogs, and aquatic animals such as seals and alligators.

  4. Tooth whitening - Wikipedia

    en.wikipedia.org/wiki/Tooth_whitening

    Tooth discolouration and staining is primarily due to two sources of stain: intrinsic and extrinsic (see Figure 2). In essence, tooth whitening primarily targets those intrinsic stains in which cannot be removed through mechanics such as a debridement (clean) or prophylaxis, in the dental office.

  5. Deep fryer - Wikipedia

    en.wikipedia.org/wiki/Deep_fryer

    Using these systems doubles the life of the oil. Oil filtration systems can sometimes be purchased as an enclosed part of the fryer to avoid involving employees in the somewhat dangerous process of filtering the oil with an exterior system. Many restaurants use a portable oil filtration system to transport waste oil to a disposal area.

  6. Paint - Wikipedia

    en.wikipedia.org/wiki/Paint

    Water-based paints tend to be the easiest to clean up after use; the brushes and rollers can be cleaned with soap and water. Proper disposal of left over paint is a challenge. Sometimes it can be recycled: Old paint may be usable for a primer coat or an intermediate coat, and paints of similar chemistry can be mixed to make a larger amount of a ...

  7. Stain removal - Wikipedia

    en.wikipedia.org/wiki/Stain_removal

    The rear of the fabric should be backed up with a clean, absorbent, material. The stain is rubbed with the sponge radially, from the centre of the stain towards its edge. It is important not to rub the sponge in a circular motion, as that causes the stain to spread in rings. Back Sponging The stained side of the material is placed face down on ...

  8. Detergent - Wikipedia

    en.wikipedia.org/wiki/Detergent

    A detergent is a surfactant or a mixture of surfactants with cleansing properties when in dilute solutions. There are a large variety of detergents, a common family being the alkylbenzene sulfonates, which are soap-like compounds that are more soluble in hard water, because the polar sulfonate (of detergents) is less likely than the polar carboxylate (of soap) to bind to calcium and other ions ...

  9. Wood stain - Wikipedia

    en.wikipedia.org/wiki/Wood_stain

    Siding stain protects against solar radiation especially UV radiation, water, fungus including mildew, and insects. Different siding stains are distinguished by the appearance they impart to wood. Certain solvent-based or oil-based siding stains contain small amounts of paraffin wax, which cannot be painted over, although re-staining is still ...