Polypropylene dust can indeed be considered combustible dust. In industries where polypropylene is processed, the fine particles can become airborne and, under certain conditions, form a combustible dust cloud. The National Fire Protection Association (NFPA) provides guidelines on handling and mitigating risks associated with combustible dusts, including polypropylene. Critical aspects include maintaining cleanliness to minimize dust accumulation, using proper dust collection systems, and following safety protocols to prevent ignition sources from coming into contact with the dust. Given its potential to ignite and cause explosions or fires if not properly managed, treating polypropylene dust with respect to its combustibility is crucial for workplace safety.

Canon inks are designed with longevity in mind, especially the LUCIA and LUCIA PRO ink sets used in their professional and high-end printers. These inks are pigment-based, which is crucial for archival quality, offering fade resistance and color stability over time when used with appropriate media. Canon claims that outputs using these inks on their Pro Platinum photo paper can last up to 200 years in an album, 80 years exposed to light, and 50 years without the glass protection. However, archival quality also depends on factors such as paper quality, storage conditions, and exposure to environmental elements like sunlight and humidity. For the highest degree of preservation, it is essential to choose acid-free, archival-grade paper in combination with these inks.

Dyeing handmade paper can give it a custom, vibrant look that stands out for various crafts or artistic endeavors. To start, choose your dye - commercial paper dyes, natural dyes (like beetroot for pink/red, spinach for green), or even water-based inks. Prepare your dye solution according to the product's or a natural recipe's instructions. There are two main methods for dyeing: immersion dyeing, where you soak the sheets of paper in the dye solution until the desired color is reached; and brush dyeing, where you apply the dye with a brush for more controlled, uneven, or patterned coloration. After dyeing, lay the paper flat to dry on a non-stick surface, or hang it with clips. The thickness of your paper will dictate drying time. Always wear gloves to avoid staining your hands and work in a well-ventilated area or outside to handle fumes, especially with chemical dyes. Experiment with diluting the dye for lighter shades or adding salt to the mix for interesting texture effects.