To transform a powder into a solid object, various methods can be employed. One approach is to add a reagent that reacts with the powder, such as water with Portland cement, which results in solidification. Another method involves incorporating a solvent or plasticizer into powdered materials like resin or latex, allowing them to coalesce into a solid form, similar to how latex paints work. Sintering is also an effective technique, commonly used in ceramics and powdered metals, where heat is applied to fuse particles together. For specific applications, such as creating pills from powdered substances, a binder like stearic acid is often used. Researching terms like "binder" and "pill" can provide further insights into the materials and processes involved in solidifying powders.