French chalk

French White.—This is the mineral talc, or French chalk, finely levigated and bolted. It forms the basis cf the moBt harmless rouges.. Perfume is added as may be desired. 

CA 32, 4338 (1938) 33, 2717 (1939) (Review of methods using incombustible powders to prevent propagation of dust explns in coal mines) K)G.Allsop et al, Translnst Mining Engrs 97, 20 39 (1939) CA 33, 7114 (1939) [Firedamp explns can be stopped by incombustible dust (such as mixt of NaCl 80, French chalk 18 Mg carbonate 2%) projected in the path of an expln. This can be done by means of motors operated by thermal relays which, when subjected to the heat of an expln, close an elec circuit] L)H.P.Green-wald, USBurMines Rept Invest 3489 (1940) ... 

Synonyms Nytal 200 Nytal 400, TY 80, Mus-solinite Magnesium silicate hydroxide Talcum French chalk... 

Layers of type (d) only. The two extremes are talc, Mg3(OH)2Si40io. and pyrophyllite, Al2(OH)2Si40io (Fig. 23.17). As in the kaolins the layers are electrically neutral, and there are only feeble attractive forces between neighbouring layers. These minerals are therefore soft and cleave very easily, and talc, for example, finds applications as a lubricant (french chalk). 

French chalk A soft, white, granular variety of steatite used for drawing lines on cloth. Intalloring. dry cleaning, etc. 

Talc, Talcum French chalk. The lumps are also known as soapstone or steatite. Finely powdered native hydrous maguesium silicate. 

Carthamin Carthamine EINECS 252-981-1 6-P-D-Glucopyranosyl-2-[(3-p-D-glucopyranosyl-2,3,4-tri-hydroxy-5-(3-(4-hydroxyphenyl)-1-oxo-2-propenyl]-6-oxo-1,4-cyclohexadien-1 -yl]methylenep5,6-dihydroxy-4-(i(4-hydroxyphenyl)-1-oxo-2-propenyl)-4-cyclohexene-1,3 ione cathamic acid safflar carmine safflor rad C.l. Natural Red 26 C.l. 75140. Carthamin, the coloring matter oif Carthamus tinctorius mixed with French chalk used as a cosmetic. 

Williams [137] had found earlier that the addition of paraffin or French chalk acted as a diluent to lead azide and lowered the detonation velocity in powder layers (30% paraffin decreased the velocity from over 2000 m/sec to... 

Steatite is mineralogically the same as talc, also known as soapstone or French chalk the term steatite, however, is usually reserved for the massive form. 

FPM. See Hexafluoropropylene/vinylidene fluoride copolymer Franklin. See Calcium carbonate Free crystalline silica. See Quartz French chalk. See Talc... 

Freezist M. See Food starch, modified Fremont 932 Water Conditioner. See Pentasodium triphosphate French chalk. See Talc French green. See Copper acetoarsenite French rose absolute. See Cabbage rose (Rosa centifolia) extract... 

Synonyms Cl 77019 Cl 77718 Cosmetic talc French chalk Hydrous magnesium calcium silicate... 

Synonyms Talcum French chalk hydrous magnesium silicate... 

For household or laundry purposes he uses by pre-Terence a soap made of oleic acid mixed, with common tallow or animal grease and resin if necessary, he adds a certain proportion of French chalk to give fiimness to the soap. The solution of silicate of soda should have a specific gravity of about 170 by Twaddeil s hydrometer. 

Mr. Bichford introduces powdered French chalk (stea tite, or soapstone) into soap, employing from 4 to about 7 per cent., according to the purpose for which the soap is to be used. For a nursery soap, 4 per cent, is recommended, and for todet soaps 5 per cent, of the powder. 

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