Color theory primary colors work at all is that the imperfect pigments being used have sloped absorption curves, and thus change color with concentration. A pigment that is pure red at high concentrations can behave more like magenta at low concentrations. This allows it to make purples that would otherwise be impossible. Likewise, a blue that is ultramarine at high concentrations appears cyan at low concentrations, allowing it to be used to mix green. Chromium red pigments can appear orange, and then yellow, as the concentration is reduced. It is even possible to mix very low concentrations of the blue mentioned and
Judo at the 2008 Summer Olympics men, 147 women and 22 places not yet allocated to a gender. An NOC may enter up to one athlete per weight category. The qualifying places will be allocated as follows: Continental qualification places will be allocated through the ranking system based on the major tournaments on the continent (continental championships, qualification tournaments). More important tournaments and tournaments closer to the Olympics will carry more points. Deadline for the unions to confirm the places was May 21, 2008. Judo at the 2008 Summer Olympics Judo competitions at the 2008 Summer Olympics in Beijing were held from August 9 to August