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Drawdown chart. Drawdown charts are rectangular pieces of non-fluorescent paper [1] which are used to test a variety of coating properties. These properties include opacity, spreading rate, penetration, and flow & leveling behavior. [2] This non-fluorescent material has to be especially rugged in order to maintain its structure and give ...
Hegman gauge. A Hegman gauge, sometimes referred to as a grind gauge, grind gage, or grindometer, is an instrument which indicates the fineness of grind or the presence of coarse particles and agglomeration in a dispersion. [1] It is commonly used to determine how finely ground the particles of pigment (or other solid) dispersed in a sample of ...
The longevity of the method is due to the ease of calculating these constants using the optical reflectometry [6] (measurement of just one application of paint with incomplete hide on a black-and-white drawdown chart for each light wavelength is required). [8]
Drawdown card. Drawdown cards are used for testing paints and coatings through wet film preparation. Black and white cards are used to measure both opacity and contrast ratio. By measuring reflectance values of both parts of the card one can gain a quantitative opacity value of a paint sample.
Historic paint analysis shares a common methodology with the conservation and restoration of paintings used to conserve and restore two- and three dimensional works of art. This involves the identification of components such as organic or inorganic pigments and dyes contained in the pigments. Historic paint analysis also identifies the pigments ...
Assorted tempera (top) and gouache (bottom) paints. Paint is a material or mixture that, when applied to a solid material and allowed to dry, adds a film-like layer. As art, this is used to create an image or images known as a painting. Paint can be made in many colors and types. Most paints are either oil-based or water-based, and each has ...
Sag resistance test. Paint and other coatings that are on slanted or vertical surfaces tend to sag when first applied. The thickness of the coating as well as the composition and viscosity will affect the overall sagging and conversely the sag resistance. In order to find the sag resistance of a coating a simple test is used.
ColorChecker. The ColorChecker Color Rendition Chart (often referred to by its original name, the Macbeth ColorChecker[1] or simply Macbeth chart[2]) is a color calibration target consisting of a cardboard-framed arrangement of 24 squares of painted samples. The ColorChecker was introduced in a 1976 paper by McCamy, Marcus, and Davidson in the ...