Watering the Air
Microbes at the Gas Pump
Chicken Eggs as Drug Factories
Frogs and Toads
Glimpses of a Legendary Woodpecker
Blotchy Face, Big-Time Wasp
How Much Babies Know
The Colorful World of Synesthesia
Hitting the redo button on evolution
Chemistry and Materials
A Butterfly's Electric Glow
Hitting the redo button on evolution
A Spider's Silky Strength
The hungry blob at the edge of the universe
A Light Delay
Play for Science
Dinosaurs and Fossils
Hunting by Sucking, Long Ago
Tiny Pterodactyl
The bug that may have killed a dinosaur
E Learning Jamaica
Results of GSAT are in schools this week
E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
2014 GSAT Results for Jamaican Kids
A Great Quake Coming?
Vitamin D-licious Mushrooms
Detecting an Eerie Sea Glow
An Ocean View's Downside
City Trees Beat Country Trees
Plant Gas
Finding the Past
Watching deep-space fireworks
Untangling Human Origins
A Long Haul
Skates and Rays
Food and Nutrition
Recipe for Health
Moving Good Fats from Fish to Mice
Strong Bones for Life
GSAT English Rules
Whoever vs. Whomever
Who vs. Whom
Problems with Prepositions
GSAT Exam Preparation Jamaica
March 21-22, 2013: Over 43,000 students will take the GSAT Exam
2014 GSAT Results for Jamaican Kids
Ministry of Education Announces 82 GSAT Scholarships for 2010
GSAT Exams Jamaica Scholarships
GSAT Practice Papers | GSAT Mathematics | Maths
2014 GSAT Results for Jamaican Kids
GSAT Exam Preparation
GSAT Mathematics
Deep-space dancers
GSAT Practice Papers | GSAT Mathematics | Maths
Math is a real brain bender
Human Body
A Long Trek to Asia
Dreaming makes perfect
Music in the Brain
Sea Urchin
Camel Spiders
Vampire Bats
Tasmanian Devil
How children learn
The Surprising Meaning and Benefits of Nursery Rhymes
Expert report highlights the importance to parents of reading to children!
The Pressure of Scuba Diving
Thinner Air, Less Splatter
Extra Strings for New Sounds
Flower family knows its roots
Fungus Hunt
Plants Travel Wind Highways
Garter Snakes
Space and Astronomy
Pluto's New Moons
Icy Red Planet
A Very Distant Planet Says "Cheese"
Technology and Engineering
Spinach Power for Solar Cells
Squeezing Oil from Old Wells
Dancing with Robots
The Parts of Speech
Countable and Uncountable Nouns
What is a Verb?
Ready, unplug, drive
Where rivers run uphill
Robots on the Road, Again
A Change in Climate
Weekend Weather Really Is Different
Arctic Melt
Add your Article

Preserving Ancient Warrior Paint

Unearthing the distant past is one thing. Preserving it is another. Chemistry can be part of the answer. Over the last 30 years, archaeologists have dug up more than a thousand, life-size warrior statues buried next to an ancient tomb in China. The figures, made of a type of clay called terra-cotta, have been underground for more than 2,200 years. As soon as the objects hit the open air, however, their paint cracks and peels off. Sometimes, the color is gone in just minutes. Now, chemists from Germany think they've found a way to keep the paint from chipping away. The warriors were originally covered with a type of material called polychrome. It consists of a layer of varnish (or lacquer) topped by a pigment. Over time, water seeped into and damaged the coating, so it cracks and peels as soon as a warrior is removed from the ground. The researchers, from the University of Munich, coated some terra-cotta fragments with a special preparation. It included a chemical called hydroxyethyl methacrylate, a part of many plastics. The preparation worked its way into the terra-cotta, replacing some of the water. Then, the scientists used radiation to turn the preparation into a plastic, binding the paint. The researchers next plan to try their technique on an entire warrior. If it works, the 8,000 warriors still buried may stay a lot more colorful when they see the light of day.E. Sohn

Preserving Ancient Warrior Paint
Preserving Ancient Warrior Paint

Designed and Powered by™