Document YrDopNx1bY1bN9QYvEeznyEwK

FILE NAME: Talc (TALC) DATE: 1959 DOC#: TALC007 DOCUMENT DESCRIPTION: Excerpt from the Annual Report of the Chief Inspector of Factories on Industrial Health ^ r:v - \ , . - ; - . . 7 - . - . . . : - b ? 4 i ' t % \ - : \ V '''*. .H.' > r*" ;%. -'; 7 7 4 / y 7 ' ""V ^:/ HKJ*'* * ^ 7 `7 .;^>;* ; ' ' ^ t f W T * . *VY 1 -i* '* * ' . ; ` v . ,, , V, ' ' ' F, n V i T ^ .* V , 'V^ ' " U r " " V * ? 7 7 k M . - 7 7 7 - . . V .'v -.7 . "*- * - ; * ' ? : & / % * > '*.'+. *~ .\ ' , ,,- ' `. . t { _- ,,<-,)',fr*^/*x'o0;, ,, V,f' .' -y' y *' ' ` ' ' V *' 'f , * , .' . '' ^ Or* " ,,_1 '^.-4., -V . , T ' ? , i r ' '' - 7 7 ' * t' ; *v - . , ,^s=* ' 1 ' -, * ?" 7 - /' . 0/' ' . , ' '7 *'v 1 7*7/* j <7 7 v'7' "i\ ' ' L , f ' *r 1 K y t : r N 7 7 ^ v v r < 7 ^ \ . .V:>f' f., V'*, '\< -. *u^r*}**u **? 'y y f iJ q & A ;; 1* / ' i "* r'::' r ' " y. ; ' "fi: ,>-: .'< - ' &" 7 ;- :' ' .. k * - ,,. 'J" > : ' Mt-- .*' V- . 6S 61 r ' 7 ^ .uKiSzv:t%, 7 m t l ^ iv r iN N v -7, . ^ :>/' - . ' V ' - .<" : M ^ .7 7 :- SKvjT '*` U37Tn*, <.rV ;;.< Sfe''SV' i ` ' r' f . , ^ 7 7 7 .; ': ^ % V ; : ;-7 'p \ J s ! -1^ '' - 1 r . M bVl O UtSNW . 7 7 v ; ` '*v`lj! r. - ,T#,M 1 .Vt'.'r*1,. ' ' fct'tfl /*' w /j4' F-f:*<' -C i ^ v,'t*-W*- owing to the availability of means nf : i ,,,hcrwis" " tolihy < * n0t be s0 true today tuberculosis, particularly in the earlv s t ^ ^ K 0" ud effective treatment of result of which the incidence of tu L r b{ chcmo[heraPy> largely as a rfek of faction by c o i ' S S tl ,^ 0!" h" "" rkedly " d containing rock and^tone' inUie*ou^iurCi" " " " ? and "luarr>'n8 of siiica- malerials, among stonc-misonc ,, ? ff ' 0t COTain lyP of refractory andlheixrtteotitdnstricsT l M l T " '" ? '/ " 11 lhe metal f a"d'"S where silicosis has occurred. f f t lC lndusInes and occupations S S iS * o "S actid" d" <* 'rtng harmful because of the mechanical irr i ^ `na y> K was considered to be edged particles of silica I?L known n " T ? by llle sma" sl 'P silica is more active S a n ' c m S i i ,, e T "" 0 f ' h,s,TM'y- crystalline recent view is that the effect is a toxic silicic acid as the silica verv lnu/i r 1 ' as kiesulguhr. A more rPUgbt about by liberation of A third theory p o s t u i S s S Se a c t i o ^ "I `" l " d " didk of electro-chemical energy on the surf-ice 1Sfbfr0Ubt about by a concentration and a fourth, the^mos^ecent that the Shr ? si,ka partlcles : is the result of an immunological response. US 6 f0rmed m the lungs haW bCCOme in-- -S*y used small even when aggreg ated !?! ? f Y a" 1TM 16 partides which remain determine their fibrogenL 1c Whv a n T ' i ^ .d.USting exPeriTM to nraih n , i c and, eff" " 1 ,, " 2 , t ? taown * n l are readily soluble and the possibility thJ " * r y' TTrhesed pac lreti?cles organs remote from the tnngs / b ^ L t m l n r ^ ^ Prd"" `1 in forms and t o T d u s t TM ^ 2*2 .h o 2 us s i " n . h ''hh r t Thh ~ ~ M sa sr associated with tuberculosis Ihan silicosl has S 1 e' idenl'y :n r s :,v r ? r " * irritant to Ihe lung tissues. } dead h> ad as a mechanical noPcause'datnage^o11the 2 t o <S"" in " C n,bta' d t a > do M Z w s re ^ i" = t3 r ?^ 54 Although earlier non-fatal c had been described, the first examination was described Inspector of Factories, and 1 cases have been reported bo Cases of a diffuse fibros dust have been reported a men were engaged in the m powder, in which processi is oxidised to alumina (a of dust of less than 10 mi [>eriod is very variable and are tiredness, loss of appet ness of the chest. X-ray . a diffuse increased fibrosi; may be associated with t death often results from j This condition may ha\ has occurred in individu. bauxite. The fumes to alumina and finely divided A study of death certil lungs and the occupation to be found on page 38 Inert Dusts not producing Certain other dusts, chit of barium, when inhaled X-ray appearances of thi those produced by silic metallic compounds whii the part of the lung tissu to the individual . Dr. A attention in 1936 to X-r Clinical examination of apparently in good healt findings and follow-up many years have shown may even regress and d It would seem that th' welding causes no harm described as occurring iron. Sometimes, how involving exposure to b. example, in foundries, 1 to a silicotic reaction. Dusts Causing lnflamnn The dusts arising fror vanadium, osmium or Although earlier non-fatal nr ,, . . had been described, the first cast- in ^,111' uniC0ni0SIS due to talc dust exposure exanttnation was d e s c rfii^ b l' `S r T PTMed by pathological Inspector of Factories, and his co-amhoTM ,? ;nM^ ughlin, H.M. Medical cases have been reported both here and abroad ' ^ m n y additional - t o exposed to aluminium men were engaged in the manufacture\v s t S , TM ^ ^ thlS COuntry' The powder, in which processes a n r ! ' r UT ping and mixin8. of aluminium a l >0 a l u r t r C a L l r r S e , 0' T fi"el? "ir4" ( dusl of less than 10 microns in size m i, t h ^ s T ^ " ?b ' c0nccntrat`o" period is very variable and lasts from a few m ^ " produced- The latent are tiredness, loss of appetite and loss i f w d ii d* n" y yCars' ^mptoms ness of the chest. X-ray changes are not r h ^ ' dyspnoea' cough and tight- a diffuse increased fibrosis with bronchitis aid**6"?*0, bUt the lungS show may be associated with tuberculosis inri d emPhysema. The condition death often resulrs from pneumonia or r f g h l S "C Z T ^ ^ has occum ^Tn f`b7 sis of the ,un8 which a s a lungs and the occupafiof to be found on page 38 of this Report!** ^ "ot P a c i n g Fibrosis of the Lungs TM fibrosis f the the basis of a ^ of barium, when 'inhded tv e ^ a l S j ^ r i o d o ft^ comPounds X-ray appearances of the lungs which mav hi S p[fodu" changes in the those produced by silica dust Th<o y difficult to distinguish from metallic compounds which are radio on aggregatI0ns of dust particles of the part of the lung "P D0 ^ -sponse on to the individual . Dr. A T Doi/anri n r fr years wlthout apparent harm attention in 1936 to X-ray changL h f t h e 'A *' Gf ,McLaughlin first called Clinical examination of diese men showld"85 of ..16.electric arc welders, apparently in good health. Work bv otheMn "? dlSabllity and all were findings and follow-up e x a illL n * T v ^ * * * ! * * home out these many years have shown that the X raJ*h ' D?lg and McLaughlin over may e,e,, regress and a t r m eT ar 'ah s* " ? It would seem that the inhalation of yea*j absence from exposure, welding causes no harm. This condition 'kTM Xlde ,i,USt produced during described as occurring in silver nolishpre uWn aS Sideros^s- has also been iron. Sometimes, h o t t e r red xid* of involving exposure to both iron oxide dust a n d r W0IJ ed m circumstances example, in foundries, have become disabLd Ih ^ ?'^ as may occur> or to a silicotic reaction. * ls ls due, in all probability, Dusts Causing Inflammation of the Lungs 55