India ink staining is a technique primarily used for identifying microorganisms and certain structures under a microscope by creating a contrast between the object and the background. In the context of capsules, India ink staining can be utilized to visualize capsule-like structures around cells or particles. When referring to "positive" or "negative" staining, it depends on how the stain interacts with the sample. Negative staining, like India ink, does not penetrate the cell or capsule but stains the background, making the unstained structure stand out clearly. Therefore, when using India ink to examine capsules, it performs as a negative stain. This method highlights the capsule by providing a dark background against which the unstained, transparent capsule appears light. This technique is particularly useful for observing fungal capsules, bacterial capsules, and other similar structures. Positive staining, on the other hand, involves the dye penetrating and staining the cell or capsule itself, which is not the case with India ink. Thus, for capsules, India ink staining is considered a negative staining technique.

Cellulose is an organic compound, which is classified as a polysaccharide. It consists of a long chain of linked sugar molecules, specifically glucose units bonded together. Its organic nature is due to the presence of carbon atoms, a hallmark of organic molecules, connected in a complex structure. Cellulose is a key structural component of the cell wall of plants and is abundantly found in nature. Its organic composition enables it to be an essential element in various ecological cycles, including the carbon cycle, and it serves as a crucial raw material for many industries, such as textile and paper. Unlike many other organic substances, cellulose is not digestible by humans but plays a critical dietary role as dietary fiber.

Low Density Polyethylene (LDPE) is extensively produced globally, catering to the demand for its flexible, durable, and versatile nature. As of recent years, global production of LDPE approximates to tens of millions of metric tons annually, showcasing its crucial role in packaging, containers, films, and many other applications. The precise amount can fluctuate based on economic conditions, advancements in recycling, and shifts towards sustainability, affecting both production and consumption patterns. Notably, regions with burgeoning packaging needs, like Asia-Pacific, often lead in production volumes, underlined by industry expansions and innovations in polyethylene technology. This information underscores the material's significant impact on various industries and the ongoing efforts to balance its utility with environmental considerations.