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Thread-locking fluid may be applied before or after assembly, depending on the type. Threadlockers are available in varieties of "permanent", "removable", and "low-strength" formulas. Many brands color-code the container and the fluid itself to indicate the degree of permanency.
In 1953, American professor Vernon K. Krieble developed anaerobic threadlocking adhesives in his basement laboratory at Trinity College in Hartford, Connecticut.Krieble's company, American Sealants, founded the Loctite brand, which was promoted as ushering in a new era of mechanical reliability by eliminating the vibrational loosening of mechanical fasteners, a frequent cause of machine ...
Shampoos work by applying water and shampoo to the hair. The specific shampoo for oily or dry hair breaks the surface tension of the water, allowing the hair to become soaked. [6] [7] This is known as the wetting action. The wetting action is caused by the head of the shampoo molecule attracting the water to the hair shaft.
[27] [28] Without force, however, the glue will spontaneously separate from the skin in time (up to four days). The glue can also cause chemical burns, and exposed skin should be washed with soap and warm water. [29] Separation can be accelerated by applying vegetable oil or acetone near, on, and around the glue. [30]
Liquid versions of hide glue are now available; typically they have urea added to keep the glue liquid at room temperature and to extend drying time. Examples of liquid hide glue are Old Brown Glue or Titebond Liquid Hide. Hide glue does not creep. Hide glue joints are easy to repair, by just heating and adding more hide glue. [7] [8] [9]
Gelled hide glue does not have significant strength, so it is vital to apply the glue, fit the pieces, and hold them steady before the glue temperature drops much below 50 °C (120 °F). All glues have an open time, the amount of time the glue remains liquid and workable. Joining parts after the open time is expired results in a weak bond.
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Curly Like Me: How to Grow Your Hair Healthy, Long, and Strong by Teri LaFlesh provides natural hair care tips especially for tight curls. [17] Better than Good Hair: The Curly Girl Guide to Healthy, Gorgeous Natural Hair by Nikki Walton focuses on afro-textured hair. [18] Writers at the Naturally Curly website provide hair care advice based on ...