Tahini United States, sesame tahini, along with other raw nut butters, was available by 1940 in health food stores. Tahini is made from sesame seeds that are soaked in water and then crushed to separate the bran from the kernels. The crushed seeds are soaked in salt water, causing the bran to sink. The floating kernels are skimmed off the surface, toasted, and ground to produce an oily paste. Because of tahini's high oil content, many manufacturers recommend refrigeration to prevent spoilage. This is particularly true among makers of raw, organic tahini, who will often prepare their tahini at low temperatures
Solder paste time in this area is known as "Time Above Liquidus". A reasonably rapid cool-down period is required after this time. For a good soldered joint, the proper amount of solder paste must be used. Too much paste may result in a short-circuit, too little may result in poor electrical connection or physical strength. Although solder paste typically contains around 90% metal in solids by weight, the volume of the soldered joint is only about half that of the solder paste applied. This is due to the presence of flux and other non-metallic agents in the paste, and the lower density