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A COR
 A cor é um dos elementos do
alfabeto visual.
 A cor é indissociável da luz
pois, para ser percebida, a cor
precisa de u...
A Cor
http://www.youtube.com/watch?v=vZDm61sZV0U&playnext=1&list=PLDD
67C0CB69D60C89&index=14
Luz e Cor
Se projectarmos num ecrã branco luzes
coloridas (azul-violeta, verde e vermelho)
verificamos que:
• da sobreposi...
Síntese Aditiva
Chama-se a esta mistura de
aditiva, porque ao somarmos
duas cores, obtemos uma
outra cor mais luminosa. Se...
Síntese Aditiva
Experiência!
Se construíres um disco de
Newton, e o fizeres girar
rapidamente, verás que a
superfície colo...
Síntese Aditiva
A pintura Impressionista é um
exemplo de aplicação do
conhecimento da Síntese Aditiva na
Pintura. Podemos ...
Síntese Aditiva
Cores Primárias
(= cores puras, ou seja, cores
que não se conseguem com
a mistura de outras cores)
As 3 co...
Síntese Aditiva
Cores Secundárias
(= cores obtidas a partir da
mistura de duas cores
primárias)
As 3 cores secundárias
da ...
Síntese Aditiva
Cores Secundárias
EXPERIMENTA!
PIÃO ÓPTICO ou DISCO DE NEWTON
http://fisicanoja.blogspot.com/
Ou
http://ar...
Para trabalharmos
com a cor nas artes
plásticas, temos que
recorrer a outro
processo, a SÍNTESE
SUBTRACTIVA, uma vez
que t...
Síntese Subtractiva
Neste processo a
mistura de cores
(pigmentos/tintas)
leva-nos a cores
cada vez menos
luminosas,
tenden...
Síntese Subtractiva
Cores Primárias
(= cores puras, ou seja, cores
que não se conseguem com
a mistura de outras cores)
As ...
Síntese Subtractiva
Cores Secundárias
(= cores obtidas a partir da
mistura de duas cores
primárias)
As 3 cores secundárias...
EXPERIMENTA!
MISTURA DE CORES:
http://www.webart.com.pt/index.php?option=co
m_content&task=view&id=243&Itemid=39
http://ww...
Referências:
LIVROS E OBRAS IMPRESSAS
CANAL, Mª Fernanda (dir.); Guia Completo para o Artista; 2005; Editorial Estampa;
Li...
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A cor - sínteses aditiva e subtrativa

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Informação sobre sínteses aditiva e subtrativa da cor para alunos do 3º ciclo do Ensino Básico.

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A cor - sínteses aditiva e subtrativa

  1. 1. A COR
  2. 2.  A cor é um dos elementos do alfabeto visual.  A cor é indissociável da luz pois, para ser percebida, a cor precisa de uma fonte luminosa a incidir sobre ela.  A cor é um fenómeno óptico, uma sensação processada pelo nosso cérebro. A Cor
  3. 3. A Cor http://www.youtube.com/watch?v=vZDm61sZV0U&playnext=1&list=PLDD 67C0CB69D60C89&index=14
  4. 4. Luz e Cor Se projectarmos num ecrã branco luzes coloridas (azul-violeta, verde e vermelho) verificamos que: • da sobreposição das diferentes luzes duas a duas resultam as cores primárias, e, • da sobreposição das três luzes resulta o branco. • Este processo chama-se SÍNTESE ADITIVA.
  5. 5. Síntese Aditiva Chama-se a esta mistura de aditiva, porque ao somarmos duas cores, obtemos uma outra cor mais luminosa. Se adicionarmos as cores todas, obtemos o branco. Assim, sempre que juntamos cores, estamos a adicionar luz.
  6. 6. Síntese Aditiva Experiência! Se construíres um disco de Newton, e o fizeres girar rapidamente, verás que a superfície colorida se altera. Ela ficará mais clara e uniforme, muito próxima do branco. http://www.youtube.com/watch?v=b3NXsgjPS Qo
  7. 7. Síntese Aditiva A pintura Impressionista é um exemplo de aplicação do conhecimento da Síntese Aditiva na Pintura. Podemos ver pequenas pinceladas justapostas de diferentes tons, que são demasiadamente pequenas para serem lidas em separado. O resultado é uma mistura óptica da cor – mistura aditiva. Para que o efeito resulte convenientemente, o público deve observar estas obras a uma certa distância. Palais des Papes Avignon (1900). Paul SIGNAC.
  8. 8. Síntese Aditiva Cores Primárias (= cores puras, ou seja, cores que não se conseguem com a mistura de outras cores) As 3 cores primárias da mistura aditiva são: - Vermelho; - Verde; - Azul.
  9. 9. Síntese Aditiva Cores Secundárias (= cores obtidas a partir da mistura de duas cores primárias) As 3 cores secundárias da mistura aditiva são: - Magenta; - Amarelo; - Azul ciano.
  10. 10. Síntese Aditiva Cores Secundárias EXPERIMENTA! PIÃO ÓPTICO ou DISCO DE NEWTON http://fisicanoja.blogspot.com/ Ou http://arco-ris.blogspot.com/2008/03/disco-de- newton.html
  11. 11. Para trabalharmos com a cor nas artes plásticas, temos que recorrer a outro processo, a SÍNTESE SUBTRACTIVA, uma vez que trabalhamos com pigmentos e não com luz. Cor e Pigmento
  12. 12. Síntese Subtractiva Neste processo a mistura de cores (pigmentos/tintas) leva-nos a cores cada vez menos luminosas, tendencialmente em direcção à cor preta.
  13. 13. Síntese Subtractiva Cores Primárias (= cores puras, ou seja, cores que não se conseguem com a mistura de outras cores) As 3 cores primárias da mistura aditiva são: - Amarelo; - Magenta; - Azul Ciano.
  14. 14. Síntese Subtractiva Cores Secundárias (= cores obtidas a partir da mistura de duas cores primárias) As 3 cores secundárias da mistura aditiva são: - Verde; - Laranja; - Violeta.
  15. 15. EXPERIMENTA! MISTURA DE CORES: http://www.webart.com.pt/index.php?option=co m_content&task=view&id=243&Itemid=39 http://www.educacao.te.pt/pais_educadores/ind ex.jsp?p=86&id_art=244 CÍRCULO CROMÁTICO: http://www.scribd.com/doc/44016593/Circulo- de-Itten Síntese Subtractiva Cores Secundárias
  16. 16. Referências: LIVROS E OBRAS IMPRESSAS CANAL, Mª Fernanda (dir.); Guia Completo para o Artista; 2005; Editorial Estampa; Lisboa; ISBN: 972-33-2148-3. SOUSA, Rocha de; Didáctica da Educação Visual; 1995; Universidade Aberta; Lisboa; ISBN: 972-674-159-9. VVAA; Ver, Desenhar e Criar – Educação Visual 7º, 8º, 9º anos / 3º Ciclo do Ensino Básico; 2009; Lisboa Editora; Lisboa; ISBN: 978-972-680-656-1.

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