Pastel in the context of "Crayon"

Hand-colouring (or hand-coloring) refers to any method of manually adding colour to a monochrome photograph, generally either to heighten the realism of the image or for artistic purposes. Hand-colouring is also known as hand painting or overpainting.

Typically, watercolours, oils, crayons or pastels, and other paints or dyes are applied to the image surface using brushes, fingers, cotton swabs or airbrushes. Hand-coloured photographs were most popular in the mid- to late-19th century before the invention of colour photography, and some firms specialized in producing hand-coloured photographs.

Caran d'Ache (French pronunciation: [kaʁɑ̃ daʃ]) is a Swiss manufacturing company of art materials and writing instruments. The company, established in 1915, produces a wide range of products including colored pencils, graphite pencils, pastels, fountain pens, ballpoint pens, mechanical pencils, markers, gouache paints, and ink cartridges.

Oil pastel is a type of pastel (an art medium that consists of powdered pigment and a binder) that uses mixture of non-drying oil and wax as binder. It differs from other pastels which are made with a gum or methyl cellulose binder, and from wax crayons which are made without oil. The surface of an oil pastel painting is less powdery than one made from other pastels, but more difficult to protect with a fixative. The colors of oil pastels are highly saturated and bright. They can be blended easily but they can break easily too.

In color theory, hue is one of the properties (called color appearance parameters) of a color, defined in the CIECAM02 model as "the degree to which a stimulus can be described as similar to or different from stimuli that are described as red, orange, yellow, green, blue, violet," within certain theories of color vision.

Hue can typically be represented quantitatively by a single number, often corresponding to an angular position around a central or neutral point or axis on a color space coordinate diagram (such as a chromaticity diagram) or color wheel, or by its dominant wavelength or by that of its complementary color. The other color appearance parameters are colorfulness, saturation (also known as intensity or chroma), lightness, and brightness. Usually, colors with the same hue are distinguished with adjectives referring to their lightness or colorfulness - for example: "light blue", "pastel blue", "vivid blue", and "cobalt blue". Exceptions include brown, which is a dark orange.

A sketch (ultimately from Greek σχέδιος – schedios, "done extempore") is a rapidly executed freehand drawing that is not usually intended as a finished work. A sketch may serve a number of purposes: it might record something that the artist sees, it might record or develop an idea for later use or it might be used as a quick way of graphically demonstrating an image, idea or principle. Sketching is the most inexpensive art medium.

Sketches can be made in any drawing medium. The term is most often applied to graphic work executed in a dry medium such as silverpoint, graphite, pencil, charcoal or pastel. It may also apply to drawings executed in pen and ink, digital input such as a digital pen, ballpoint pen, marker pen, water colour and oil paint. The latter two are generally referred to as "water colour sketches" and "oil sketches". A sculptor might model three-dimensional sketches in clay, plasticine or wax.

Pastels or pastel colors belong to a pale family of colors, which, when described in the HSV color space, have high value and low or medium saturation. They are named after the artistic medium made from pigment and solid binding agents, similar to crayons. Pastel sticks historically had lower saturation than paints of the same pigment, hence the name of this color family.

The colors of this family are usually described as soothing, calming, and nostalgic. They tend to lean towards ideas of simplicity and help to contrast against the bolder and brighter colors that trend in our world. They are integrated into interior design in many places, such as healthcare to help soothe anxiety, or in classrooms to help the mind focus. Pastel colors work to oppose the brighter, bolder colors that tend to be common in many other places.

In art, in particular drawings in pastels, charcoal, chalk, and other dry media, a fixative is a kind of preserving agent applied over the top of the drawing to prevent crumbling, smudging, fading, and discolouring.In times gone by, natural substances such as diluted egg white were painted on, but today synthetic sprays are usually used. However some artists, such as the Aboriginal Australian artists at Warmun, Western Australia, use traditional substances, in this case gum gathered from local bloodwood trees.

Fixative is similar to varnish, but there are some key differences. Varnish is often used to protect paintings from atmospheric moisture, sunlight and dust; it helps to protect from being scratched, and makes the colours brighter. Fixatives prevents smearing.