He Xie Fen Cai pigments are responsible for its vibrant colors, as well as the unusual texture additional info. These pigments, which are complex chemicals, interact with light, binders and other environmental factors in fascinating ways. These interactions can be used to help artists understand their materials and create new pastel approaches that make the most of their special qualities.

Pastels are made from the same pigments used in oil paints and watercolours. However, they also contain a small amount methyl cellulose or gum arabic as binders. This allows for more pigment to be loaded per stroke. Colors appear brighter than with other paint forms. Chemical stability and lightfastness can vary greatly depending on the source and composition of pigments.

Organic pigments (carbon-based, often synthetically produced) have a variety of colors but are not lightfast, causing them to fade over time. Inorganic pigments based on metals and minerals are stronger and more fade-resistant. Cadmium, ultramarine and other inorganic chemicals are used to create the brilliant yellows of pastel paintings and the deep blues.

Size of pigment particles can also influence pastel behavior. Finer particles are better for finer details and smoother applications. Coarser particles provide texture, reflect light and give the artwork an unique shine. The particle size difference affects how pastels adhere and layer on paper, which is important for creating multidimensional effects in pastel artwork.

Binder interactions with pastel pigments are fascinating. Binder selection and quantity affects the amount of pigment that is deposited on the paper and the quality of the pastel. A pastel stick with less binder will deposit more pigment. However, it can smudge. A firmer, more precise pastel may allow greater control but produce less color per stroke.

Durability of pastel artwork is also affected by the pH level of pigments and binder. Certain pigments may be affected by acidic environments. To preserve color vibrancy, pastel makers often use neutral or slightly-alkaline binder.