The quality of the bone char can be easily determined by its color.

Bone char is also used as a black pigment.

Today it is considered a synonym for bone char.

Bone char or coal-based activated carbon is traditionally used in this role.

In India, the black color of the ink came from bone char, tar, pitch and other substances.

Grey-brownish bone char are the best quality chars for absorption applications.

It is then further purified by filtration through a bed of activated carbon or bone char.

White bone chars are overcharred bones that present low fluoride removal capacity.

The sugar refining industry often uses bone char (calcinated animal bones) for decolorizing.

The quality of the bone chars is usually controlled by the amount of oxygen present in the charring atmosphere.

Methods of reducing fluoride levels is through treatment with activated alumina and bone char filter media.

Ivory black was traditionally produced by charring ivory or bones (see bone char).

Bone char (Calcium triphosphate) is used to remove fluoride from water and to filter aquarium water.

The process involved vacuum distillation of the crude material followed by filtration of the still residue through bone char.

As bone char does not seem to remain in finished sugar, Jewish religious leaders consider sugar filtered through it to be pareve and therefore kosher.

Ivory black, also known as bone char, was originally produced by burning ivory and mixing the resulting charcoal powder with oil.

Bone, including bone char, bone meal, etc.

When dissolved, the resulting liquor contains the minimum of dissolved non-sugars to be removed by treatment with activated carbon or bone char.

About 25% of sugar produced in the U.S. is processed using bone char as a filter, the remainder being processed with activated carbon.

In contrast, Muslims consider filtered sugar to be haraam because the animals may have been improperly slaughtered or bone char may contain pork remains.

Carbon pigments: carbon black (including vine blac, lamp black), ivory black (bone char)

Human bone char, referred to as "bone charcoal," is mentioned in Thomas Pynchon's novel The Crying of Lot 49.

Dippel's Oil (sometimes known as Bone Oil) is a nitrogenous by-product of the destructive distillation of bone char.

Other commonly used, but perhaps less well-known, animal products are beeswax, bone char, bone china, carmine, casein, cochineal, gelatin, isinglass, lanolin, lard, rennet, shellac, tallow, whey, and yellow grease.

It can be accomplished by percolating water through granular beds of activated alumina, bone meal, bone char, or tricalcium phosphate; by coagulation with alum; or by precipitation with lime.

Bone charcoal is used by industry to refine sugar.

A: Some refined sugars use bone charcoal as a decolourant.

Bone charcoal is the oldest known water defluoridation agent and was widely used in USA from the 1940s through to the 1960s.

Bone charcoal," Oedipa remembered. "

This project will test, under field conditions, the use of a household defluoridation method based on the use of bone charcoal that has been locally prepared.

Bone is used to produce bone meal for stock feed, production of fertiliser, glue, bone china and bone charcoal.

Into the commercial break now roared a deafening ad for Beaconsfield Cigarettes, whose attractiveness lay in their filter's use of bone charcoal, the very best kind.

I have heard that bone charcoal is not used in Australia in the processing of white sugar anymore, except for in Western Australia.

Spirits are suitable for vegetarians except for some Russian and Eastern European Vodkas which may have used bone charcoal in their production.

Bones: Bones & cartilages are converted into stock feed, fertiliser glue, dice, knife handles, buttons, bone charcoal, bone china.

As I remember," said Rupen slowly, thoughtfully, "phosphorus is obtained from either phosphorus-bearing minerals, rocks, or from bones or bone charcoal.

Human bone char, referred to as "bone charcoal," is mentioned in Thomas Pynchon's novel The Crying of Lot 49.

Colour case hardening occurs when soft steels were packed in a reasonably airtight crucible in a mixture of charred leather, bone charcoal and wood charcoal.

Bone charcoal is subject to such extreme temperatures (approximately 1200o F) during processing that it does not pose any risk for transmission of BSE and was deregulated in 1996.

Mamut picked out a piece of bone charcoal from the fire as Ayla got a mammoth skull and a hammer-shaped drumstick made of antler and sat down beside him.

Dan Barber of Blue Hill at Stone Barns, in Pocantico Hills, N.Y., cooking cabbage and asparagus with the help of a pork bone charcoal.

Defluoridation methods were tested and it was recommended that further work should concentrate on: modified activated alumina method (i.e. alumina mixed with clay); bone charcoal; and under special conditions, modified Nalgonda technique.

Vegans can be as strict or lax as they want to be in their food choices: the International Vegetarian Union's website includes vegan-friendly reminders about baking pans greased with animal fat, grain cereals that include animal-based glycerin, and sugar refined with bone charcoal.