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Chapter 3 Activity 6

PAINTS. Chapter 3 Activity 6. Ancient paintings. Where did they get their paint from?. Ancient paint. Ancient paints were derived from finely ground, naturally occurring minerals. Leonardo Da Vinci made some of his own oil paints. What ingredients are in paint?. Pigment Binder

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Chapter 3 Activity 6

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  1. PAINTS Chapter 3 Activity 6

  2. Ancient paintings Where did they get their paint from?

  3. Ancient paint • Ancient paints were derived from finely ground, naturally occurring minerals

  4. Leonardo Da Vincimade some of his own oil paints

  5. What ingredients are in paint? • Pigment • Binder • Liquid/Solvent

  6. Pigment • finely ground particles or powders that are dispersed in paints, provide color • produced as insoluble products of double replacement reactions • May be a variety of colors depending on the metal ions that are involved in the compound

  7. Pigments The mixture of cobalt(II) chloride and aluminum chloride is being homogenized Heating of the mixture in a test tube After several minutes the reaction is completed The finished product Cobalt blue pigment

  8. Solutions of cadmium(II) nitrate and sodium sulfide Cadmium yellow pigment heating the solutions precipitation reaction Stirring the precipitate Filtering the precipitate

  9. Pigments Verdigris pigment [Cu(CH3COO2]2. Cu(OH)2. 5H2O The reactions that produce an insoluble compound are called DOUBLE REPLACEMENT REACTIONS

  10. NO3- Pigments The reactions that produce an insoluble compound are called DOUBLE REPLACEMENT REACTIONS AgNO3(aq) + KCl(aq) ‑‑‑‑> AgCl(s) + KNO3(aq) precipitate The product of this reaction that is insoluble in water is called the precipitate (ppt). It is this substance that can be used as the pigment in paints.

  11. What ingredients are in paint? • Pigment • Binder • Liquid/Solvent

  12. Binder • A substance that is mixed with the pigment to bind the pigment particles together • Once the paint is dry, it also binds the pigment to the painted surface. • Could be • oil (oil based paints) • acrylic resin (acrylic paints) • Egg yolk (tempera paints) • glue

  13. Egg Tempera

  14. What ingredients are in paint? • Pigment • Binder • Liquid/Solvent

  15. Solvent • Usually a volatile liquid that is added to the pigment and binder to adjust the viscosity (resistance to flow) of the paint. • It evaporates and does not become part of the paint film that remains on the surface. • Not all paints contain a solvent.

  16. Solvent This is the paint when it is first applied: Pigment and binders are the circles and squares. The blue is the solvent. The solvent is starting to evaporate. Pigment and binder come closer together. Paint is dry, pigment and binder have been fused together and form a tough film.

  17. Bill Nye House Paint

  18. How oil Paint is made

  19. How Latex Paint is made

  20. Smartboard review

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