Mandau bone hilt

Mark · 9th June 2006, 09:50 PM

I recently learned from a U.S. Fish & Wildlife inspector a trick for distinguishing bone from, for example, ivory or plastic. Under an ultra-violet light, bone will glow white, while plastic will not glow at all and just looks dark, and ivory will glow VERY bright white. It was a cool trick, and easier than the "burn and sniff test" or squinting at it through a magnifier to look for microstructure. The problem is getting a UV light.

mross · 9th June 2006, 10:09 PM

Quote:

Originally Posted by Mark Bowditch

I recently learned from a U.S. Fish & Wildlife inspector a trick for distinguishing bone from, for example, ivory or plastic. Under an ultra-violet light, bone will glow white, while plastic will not glow at all and just looks dark, and ivory will glow VERY bright white. It was a cool trick, and easier than the "burn and sniff test" or squinting at it through a magnifier to look for microstructure. The problem is getting a UV light.

Would this help?

http://www.copsplus.com/prodnum5044.php

Mark · 9th June 2006, 10:33 PM

Great! Everything I was finding was lab-grade equipment costing $100 or more. Thanks.

VANDOO · 10th June 2006, 03:18 AM

ON A POOR CAST THERE ARE OFTEN BUBBLES THE MORE BUBBLES THE WORSE THE CASTING. THEY APPEAR AS LITTLE HOLES THAT ARE SPHERICAL ON THE INSIDE. A GOOD CAST WILL HAVE VERY FEW OR PERHAPS NONE AT ALL. THE ITALIANS DO A GOOD JOB ON THIER CASTING OF STATUES AND FIGURINES AND SOME OF THE FAKE IVORY IS ALSO WELL DONE. BUBBLES GET TRAPED BETWEEN THE MOLD AND THE CASTING MATERIAL WHEN IT IS POURED INTO THE MOLD. IF THERE ARE BUBBLES IN THE CASTING MATERIAL IT CAN ALSO CAUSE PROBLEMS. THERE IS A ANTI BUBBLE SOLUTION TO COAT THE INSIDE OF MOLDS AND THE APLICATION OF VIBRATION OFTEN HELPS TO GET THE BUBBLES OUT.

9th June 2006, 09:50 PM	#1
Mark Member Join Date: Dec 2004 Posts: 987	I recently learned from a U.S. Fish & Wildlife inspector a trick for distinguishing bone from, for example, ivory or plastic. Under an ultra-violet light, bone will glow white, while plastic will not glow at all and just looks dark, and ivory will glow VERY bright white. It was a cool trick, and easier than the "burn and sniff test" or squinting at it through a magnifier to look for microstructure. The problem is getting a UV light.

9th June 2006, 10:33 PM	#3
Mark Member Join Date: Dec 2004 Posts: 987	Great! Everything I was finding was lab-grade equipment costing $100 or more. Thanks.

10th June 2006, 03:18 AM	#4
VANDOO (deceased) Join Date: Dec 2004 Location: OKLAHOMA, USA Posts: 3,138	ON A POOR CAST THERE ARE OFTEN BUBBLES THE MORE BUBBLES THE WORSE THE CASTING. THEY APPEAR AS LITTLE HOLES THAT ARE SPHERICAL ON THE INSIDE. A GOOD CAST WILL HAVE VERY FEW OR PERHAPS NONE AT ALL. THE ITALIANS DO A GOOD JOB ON THIER CASTING OF STATUES AND FIGURINES AND SOME OF THE FAKE IVORY IS ALSO WELL DONE. BUBBLES GET TRAPED BETWEEN THE MOLD AND THE CASTING MATERIAL WHEN IT IS POURED INTO THE MOLD. IF THERE ARE BUBBLES IN THE CASTING MATERIAL IT CAN ALSO CAUSE PROBLEMS. THERE IS A ANTI BUBBLE SOLUTION TO COAT THE INSIDE OF MOLDS AND THE APLICATION OF VIBRATION OFTEN HELPS TO GET THE BUBBLES OUT.