movescas.blogg.se - Van black ink

The water carries some parts of the ink components further than others, and the colors separate out into a range of colors. In this experiment, the water moves across the paper by a force called capillary action. Modern black inks in marking pens are usually mixtures of a variety of colored pigments mixed with different liquids.

There is no such thing as “black light wavelength,” so why do black T-shirts, black crayons, and black marking pens look black? A red object looks red because it reflects the red wavelength of light, and the same is true for all other colors. You may have heard of these wavelengths shortened to ROYGBIV, which stands for red, orange, yellow, green, blue, indigo, and violet.

Visible light-light that the human eye can see-is made up of the wavelengths of all the colors.

Fill out the data table in the downloadable PDF with what you observed for each brand of marker.

Repeat with the other pens on the other coffee filters.

What happens to the black dot and its color?

Observe what happens when the first drop of water hits the black dot, and when you add more drops.

Drop water onto the center of your black dot.Lay the coffee filter over the top of the jar.With a pencil, label the filter paper with the brand of the marker you are using.

Choose one of the marking pens and color a solid circle in the center, about ½ inch (about 1 cm) across.

Lay a flat coffee filter on top of a piece of paper on a flat surface.

When you are ready to release the liquid, remove your finger from the top of the straw. When you remove the straw from the liquid, the liquid will remain inside the straw. Place a finger over the top of the straw to make a seal.

3 different brands of black markers (include both “water-soluble” and “permanent” markers).