There is air in the fracture; when you suck out the air with a
vacuum, you get the air out of the fracture; when you release the
vacuum, the resin is sucked in where the air was.
In the interest of full disclosure: I have no expertise in fracture
filling and have never been able to get Opticon to do anything
useful. But I've been a lapidary for about 30 years and have an
interest in the way stones are manipulated by heating, or by using
resins in treating and, or, in stabilizing. I take stabilization and
treatment to be different processes with different goals.
The process with Opticon might work for perhaps a mm in depth. People
I've spoken to who said they had success used Otpicon after the stone
had been cut and shaped. It was the final thing so as to avoid having
to go below the surface of the stone treated with Opticon.
I've also met people at Tucson and other places who treat stones and
are able to get the treat to penetrate throughout quite large pieces.
I'm living in an area where "chalk" turquoise has been successfully
treated for decades. Technology has advanced enormously in the area
of stone treatment and stabilization. It also requires very
sophisticated and expensive equipment to do it successfully.
I guess the point of clarification here is, that as i understand it,
is that Opticon is a superficial treat with little penetration
whereas there is stone treatment that will penetrate five inches or
so of material, perhaps more.
Just one person's experience; I'm always ready to learn more. The
technology is fascinating.
as of 8/24/06: www.kevinpatrickkelly.com