Glue is usually not a top priority for me, which is why when my partner Richard showed me the beautiful cutting boards he made—hard oriental maple, with the purple veins of African red sandalwood passing through—I thought about it. Trees must grow in extremely complicated ways that I have never noticed. Only when I heard him and his woodworking colleagues talking about “gluing” did I realize that mixing wood involves a strong adhesive. When we call it the most suitable name for Elmer’s, the magic of this substance It’s a big discount.
Mukah turned into an alien again quietly. Some of the names in the adhesive are related to activism: Mildred Bonney and Langdon T. Williams, the couple founded in 1935 in Columbus, Ohio The adhesive company Franklin International Inc., and its flagship product, Titebond, was released in 1955. Titebond is a polyvinyl acetate (PVA) glue. It expands the fibers of the wood chips and makes them intertwined; as the glue dries, the fibers shrink to their normal size, but they are now entangled and are almost unbreakable.
Although some luthiers still use animal glue when making stringed instruments-yes, the kind made from animal skins-most woodworkers have turned to PVA, especially Titebond, especially (for projects that require it) Titebond III, It inspires an aria of awe throughout the woodworking Internet because it advertises itself as completely waterproof, although it is undeniable that some experts doubt it. It also has a wide “open time”, which means that even if you are hesitant about how to arrange the wood for a full 10 minutes, it will remain sticky and will not dry out. Titebond II only gives you five.
However, the real breakthrough of all Titebonds is of course bonds. How much cleavage, compression, bending, impact, tension, or shear does it take to break the Titebond bond plane? This is measured in pounds per square inch, and Titebond III needs up to 4,000 pounds to break. Two tons. Hardwood will crack before this glue.
From glue to eyelashes. Although the old-fashioned false eyelashes do require glue, they are much weaker than Titebond-considering that the eyelids are tightly sealed, this is sufficient. The new thing in eyelashes is a synthetic prostaglandin analog called bimatoprost. (Synthetic prostaglandin analogues are also the active ingredient of misoprostol. Misoprostol is one of the pills approved for self-management of abortion.) Chemical engineers can clarify the working principle of ultrasonic machines and PVA glue. Bimatoprost is A happy accident, but also a mystery. Essentially, ophthalmologists are working to reduce the intraocular pressure of glaucoma patients. They found that bimatoprost can relax the ciliary body—we shrink for a long time when we read on our smartphones. Anxiety muscles in the eyes-this causes the aqueous humor in the eyes to flow out. Eye. They were surprised to find that the movement of this plasma-like liquid also played a miraculous effect on the eyelashes.
The invention of the technology to grow hair seems to be the highest desire of mankind, which is a kind of stimulation. “Oligoidosis”, or “insufficient eyelashes” as the National Institutes of Health calls it, is a disease treated by bimatoprost. This can be seen in hair loss patients, but of course this compound is more futile. What’s exciting is that bimatoprost may even cause hirsutism-overgrowth of eyelashes, creating dense, rich edges on the eyes, eliminating the need to use thick mascara. “These hairs,” the National Institutes of Health report said, “looks stronger, longer, thicker, and darker in color. Compared with the control eyes, they have a sharper angle with the skin.” The only gain? Hirsutism caused by bimatoprost is sometimes accompanied by “irregular eyelash curling patterns.” Oh damn it.