THE CHROME TANNING PROCESS

Colonist, Volume XXIV, Issue 2779, 6 November 1880, Page 2 (Supplement)

THE CHROME TANNING PROCESS

Wh perceire'tbat'our leading article of J&ne: 19th on the cHrdme'deposiisof this Froyin'c* has ifeen-re-pririted;i'n >tb.e''Glasgow of August 4th. The subject possesses* peouliar intereei for Glasgow,:ar it'i» the-seat of' the largest-'* bi-chrpme-' works'in ! tbe: world, 5 and the ordinary'supply of chrome ;ore<frd'ni x the Bhetlandß,and{Marylandl(U.S.) no longer Buffioea-iorotbeicrequiremjjnts. In tbe article referredito wa made mention.of ainpl?-tanning? process, invented in Germany, in which bark is dispensed with, and bi-chromate '.of ipotaih i is tha chiefjingredianfc.employed. l< It r appearsthat this invention of *.' mineral tanning!' has. proved a complete suooess in Germany, and is now being warmly tafcen upinEngland!'fThe Eglinton Chemical Company have acquired the patent rights for Greatßritaitfand allthe CoTopieß, ; ,aDd, opened fanning yard at ■Glaa>-j gow.to affprd to,tba.trade practical,.proofs t p£ tho,valuV,orVbfiproceßi,]fpr^y.hioh t^hey:.claim,, ieveral ; advantagea.., pver, the; .tjme;.honore.cl,: tamjing-iby oak .bark, jthe,,)Leather, being .more > pliable and ;more '>. durable, itbe time required very .much shortened,' and the;co3t, per-pound of leather reduced' from Jfai t? 2d.- ; Asnot only; .the ; chrome, ore,, but, the .other requisites. t for manufacturing birchrome.,. i are i abundant in this district, we hope,: to, Hear .pi a,company ... being formed to.meet the. rising.demand for this article'of commerc'e^hd also to^nvaniifaotore, j tne lJ'onrdnVe'pSintsJ of ( which, the con- : , Bumptirfn in this group o| coionies ffiost be' oongiforable.'.J", [.•,.: „.,• .-^ „..•; ... oui Tothe.Ediior'iiftheCoiohtii.'Sib, —With rsference_.to the new method cf tanning (leather-mentioned -in-yesterday'by Colonist^ I 'beg to say'that;}/tried it with complete buocobs Borne months ago, and will, by yjour; leave, .^escribe^itj^BO tbafcianyTone" laay' jdb.' tb'e same.; /.The", hides,^ having^been;' swelled and! liineft iri the .usual .manner, are , place&'.in a, Bolution"of .'alum/, ten"jp'er cent.' •trong', with jmali pieces, '.'of..zinc, for, twenty r, four' f bouiV;. "secondly, they," are , Vim-, xn«rsed.'in :<a 'bath'consisting'ofa^strong. Bolu'tibn' jof chrp mate 'of. bidbrprnate' of potash—(ihe'^p'rfeßp'pn to of "magnesi»"'i»r 'of lime 1 may ,be .'",subHtitu&d^ for two or thrjeb' days, according to the th'ipfcnearf'pf:thVakin..;! thirdly; a| bath' .of r ; ferraror J ferrid cyanide of potassiuni is used for .^welve hours in 'the caie. pf |upper leaiib^r,'bbu r may, bedlspeasfsd|,with' for sole' leatbVr; ■fourthly, they plac6d< ,for. twenty, ; four,. hpura in a,, batbof m^riate.^of .barytes^.pr.^pfraoetate qv,> of diacotato o^. Jead.}^finally, .fat.. mixed .witfij thymol or carbolic acid if rubbed into ' them; then they are ourrijd.in the) Usual; way.,- ; All testimony is in "favor of the quality of the ..leather. thua it' ;being ■ found more/durable, pliable, and 'impre'vioua to water than ordinary leather!—-Ypuri; &0.",' J''' t; ;.,,,. '; (;;; - : ;,- ---" ;::2o •' iheJEldiiorfO/^h'e.Cp\<mist\;: h\\r-\ Bib,—Ab pu,blio attention is'at length'being.. reused to take interest ia the extensive chrome deposits ntar .Nelion, ■• it .may not bo . amias. tol refer te another use to which the:6re;iibeinf; pat besides the manufacture of bichroma;Jf ; has been found, that, .a, smalL proportion of ohrome ore'added to at eel inta state of fusion prod apes V metal of unequalled tenaoity... t ;Ap*/; cordiDg. to Ure's_Diotipriary '(siippiemADt io last edition, page 483) the tensile itrength of If in. bars is increased, from 133,00.01 bi, which is that of carbon steel/ t'of"i64iooolh» for the lowest, andvllß9,ooOl6a fdr^Jthe'bigh«iti; of chrome Bteol. Other advantages are mentioneainitbelsiame frofkvj{£;leaveypurreadersto calculate the demand to arise for Nelson. chrome lor thia-purpos* alone.^-J;ami:&o., V;O < ■■'. y;■-•- ••. v : fcWJ TxriOSi / i itelaon, October.2B,lßßo.! ;<:K , c .-.; -j^