WHAT EFFECTS DOES THE SUNLIGHT HAVE ON

RUBBER, INK, OR PAPER?

By: Kirsten Futch

Research

• Ultraviolet light• UV radiation• Rubber bands• Paper• Dyes

Hypothesis

• If I put rubber out in the sunlight it will then loose its elasticity, if I put ink out in the sun it will then fade, and if I put paper out in the sun it will then crumble up.

Independent and Dependent Variables

The independent variable: The amount of time the sun hits the object.

The dependant variable: The color of the dye, the effects on the paper, and the stretchiness of the rubber bands.

Controlled Variables

• The temperature• The kind of paper• The type of dye• The type of rubber• The position the items are in

Materials • Two UV lamps• Paper• Magazine• Newspaper• gift wrap• rubber bands• aluminum foil• aluminum pans

Procedures

First we put the rubber bands in aluminum pans. Then we put aluminum foil tapped around it so the heat wouldn’t go out. Next, we put the ink (magazine, gift wrap, and newspaper samples) under the UV lamp. We covered half of each ink sample with black construction paper so you could see the effects. After that, we put the equally cut pieces of paper under the UV lamp.

DataExperiment #1

Rubber bands Control 48 hours exposure

Color Tan Light-tan

Feel in touch Rough and Rubbery

Smooth

Elasticity A lot of elasticity Less elasticity

DataExperiment #2

Sample ink Most affected by the UV light

Newspaper Most effected

Gift wrap Medium effected

Magazine Least effected

DataExperiment #3

Paper Color

After 48 hour exposure paper

White

Controlled paper White

Conclusion

In conclusion, the rubber that was under the UV lamp lost its elasticity and, the ink turned yellow-ish, the paper stayed white. I hypothesized that rubber would loose its elasticity, the ink would fade, and the paper would crumble up. So my hypothesis for the rubber was right , but the other two I was wrong.

Pictures