To seal a leaking PVC joint, first, turn off the water supply. Clean the area around the leak thoroughly with a dry cloth and sandpaper. Apply PVC primer around the leaking joint to prepare the surface, then apply a heavy layer of PVC cement over it. Ensure the cement covers the leak entirely and extends at least an inch around the joint. Allow it to dry according to the manufacturer's instructions, usually for several hours. After it has fully cured, turn the water supply back on and check for leaks. If the leak persists, consider using a rubber repair sleeve or replacing the joint entirely. Remember, proper preparation and application are key to a successful seal.

Dying Delrin, a brand name for acetal resin, involves using dyes that can penetrate the material's structure, considering it's a thermoplastic polymer. The process often includes using disperse dyes, which are designed for coloring synthetic fibers. To dye Delrin, you'll first need to clean the piece to remove any oils or contaminants. Next, prepare the dye bath. Heat water to a near-boiling point, then add the disperse dye, stirring until fully dissolved. Immerse the Delrin piece into the dye bath, maintaining a consistent temperature for an even dye uptake. The time required can vary based on the desired color intensity, but it usually ranges from 30 minutes to an hour. After dying, rinse the piece under cold water to remove excess dye, and then let it dry. It's crucial to wear protective clothing and work in a well-ventilated area, as the dyes and the process can be hazardous. Additionally, testing the dye process on a small piece or scrap of Delrin can help you gauge the outcome before committing to the final piece.

1. Taika Corporation is a large Japanese manufacturer of chemical products. including different forms of titanium dioxide such as rutile. Chemou is a U.S.-based company that also produces titanium dioxide along with other products. This pure form of titanium is commonly used in various industries like construction and automotive. Tronox Limited is a global mining and inorganic chemicals company operating in North America. Europe. and South Africa. They offer a range of titanium dioxide products. including rutile. Longyi Bailian. headquartered in China. specializes in high-performance titanium dioxide pigments for various applications. Kronoss Worldwide Inc.. a global company. markets coatings. plastics. paper and more. Venator Materials is another global company catering to the plastics. coatings. and construction industries with their chemical products like titanium dioxide pigments. Lastly. Ishihara Sangyo Co.. Ltd ISK. a Japanese chemical company also produces titanium dioxide along with other chemical products available in both anatase and rutile types. It is recommended to contact each vendor for the most accurate and up-to-date information on availability and specific products offered.