Show All Items. Flux is used in soldering to remove oxides from the contacts of the parts to be soldered together. Fluxes can be made from hydrochloric acid, zinc chloride or rosin. Here is a simple and easy homemade rosin flux made from pine cones.
It will cost $2,400 to acquire a small ice cream cart. Cart sales are expected to be $1,600 a year for three years. After the three years, the cart is expected to be worthless as that is the expected remaining life of the cooling system.
Buy dry ice in block form. Performing school experiments and creating fog effects both require blocks of dry ice. 1  Dry ice also comes in pellet form but is mainly used for dry ice blasting to clean surfaces, or for medical transportation. 2  The price of dry ice ranges anywhere from $1.00 to $3.00 per pound. Plan to pick up dry ice as close to the time you will need it as possible. 2  Since it is constantly changing from solid to gas, it has a very short shelf-life. 3  Every 24 hours, 5-10 pounds of dry ice turns from a solid to a gas.