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? ro 1 Tfre D e 1* Of A t K 1n S la * r CONFIDENTIAL SUBJECT TO PROTECTIVE ORDER ns* 019236 ECZIXOLOGXCAL SE.. R V I C E fa in t T u fi * Outnt will) *)il>iwnriit pa.Mir typ e mfnr, circular I m rta l pint? l>< |il:iifnn, frirlliin-tnp cun (tiiilnini't. ai"l w ( n i f l - i i l i - J PAINT TESTINO OUTFIT 'n* I 'rtint T e n tin e O ut lit it :t mml'iiicd (r u r r a l 1'itrpnse Model nml has hern rifu*! h y l h n A .S .T .M . in standard mi-ihml H-filiti fur testing the consistency of riot hows- p a in ts mid enamel ly*H* paim-O'* ml h y the l j . S . G overnm ent in ?pe i T T - i'- M .'n *. sum , lin i: and le st n u llm d * for p a in t, varn ish , . p u t m i'l r*lal*<l m a te ria ls, In th is w ttlii tin* ustmt weight lew has been replaced ' set n i d i tted w eights w ith n limiKi-r, ::iil the ry lin d rira l rot nr h at lin'i |iy a sid 'in erg eil paddi* type ritir.,` T h e tesi container is a standard one* J f rit'I im i-l iip ran ! P , i m l n s in diameter svilirli, in Use, replares tin* istmi Irs t *am i va le r h a th . I t is supported lv it rir ru la r metal plate provided for the p al/nriti. t e s t iM io rK m iK i: i. M ix the paint wimple thnrm ichly amt strain it Into the container. ftrini* the npi-rntnre nt the sam ple In 2T>' 0 .2 5 ' C and m aintain it nt th a t tem perature ring iln* test. i. r.`.tc the rm ilnlner on the metal plate of the platform and raise until the d ille typ e rotor Is c e n tra lly immersed in Ihn sain pic to the m ark in scrilicd on the or shaft. I '. s iw| t 1 *tY n t l e t e . u l l i . <>T < l.5 .T ,.V . 5lxm l(inlr m i l'u r i | J , JV*n* ilh f ,Wli t i n t s . r m S i r f l fi m l, ( if, 1 ' )iri*'.ti-lly u (<vrV 71 M u s u W->! tn pain Irrtln c Dulftt*. Iiul ha* br*n r*t>Urul h y lha auhinrjxrd i j | f whl(l* Maura m uti*. ^ U T 1 1 U R I I . T H O M A S C O ., P H I L A D E L P H I A 5, P A ,, U .S .A . 15 . TECHNO I' O 0 ! C A I, S E U V t C V. H. llr f u r r Mnrtl'iin (h r test, relra'O the b raltr and-check the number of revolutions of t)r ru ln r in frmn *2ii in IS;" second':, it measured by a stopwatch. l.'.tinc d ilh w r.t W ei;;ltls, determine the tin' r r ip iir ril fur IUO revolutions of th'* m l nr. S rb *r: weights th a t w ill c.iv i* u l least two renuincs w ithin r n i;r of 27 to 12 seconds. These deter m ination* should In* made from a nom ine s ln rt, D ia l if*, the rotor should In- allowed to Minim nl. least 10 ro vn iiilio u s licfnrt* tin* I m ini; of lit*' test is started. Determ ine, bj* p ln llim ; or in tcrp n ln lin ii. tin* weight In cram s nrceswnry In produce 100 revolu tion* of the rotor in .'JO scrim ds. K re b s Units nod Use n f K re b s ' S lo rin e r f l i a r l . " M any paint m anufacturer* have adopted Krel*s U n it rafi:i|pi as deiiced lr<nn I h r K re b s' Sinrnu*r U h a rl, for classify in;; tin* consist n ic y of pain ts. T h e ch art. as shown on pa::e 20. la h td at''* l|** d rivin g w eli; lit in grains ;i|**iiu::l. tin* linn* in second:; for I till revnh.it ions oT the paddle. sam e pro cedu re is follow ed 1 n iillin e d ab o ve, tn h in i; ra re In m a in ta in tin* le n i|ie ra tn ri* nf th e cam p le a l 2"r< ` i IJ.2*> Tin* num ber nf K reb s U n its is found sim p ly by readini; in I h r appropriate linn and e 'lb im n . >'r in ia . if nlll) g ra in s r n ie r d the p a 'h iie to m ake 1110 re vo lu tio n s in ,*PJ ju'cnndx. tb' n ia le ria l und er li-st w o u li1. h av e ih>.* co nsisten cy of 112 K re b s U n it s . A p a in t considered In be uf proper b n rd iio p consist ra c y lias b" eii j;iven tie- a rb itra ry v a lu e nf 111'! K ret is U n its . A d d iliu n n l p a in ts , Im 'li th ic k e r and ib in u e r tiia n tin stan d ard , were then prepared am i, of these, certain nncs were selected in dtlb-r in rn iisiN len ey Jiy a r b it r a r ily p iven ta llie s [ in K re b s U n its r.s iiij; the m editn d K ln r u v r 1'a `m l T e a tin i; O utfit., ('n ie d ste u e y nf p a in ts v a r y in i; fro m Hi* In 1<m) K re b s U n its w as th en m easured. No Ilu cen t w eig hts w ere em ployed io r each sam p le in v a r y the lim e r e ip iim l for 100 re v o lu tio n s uf th e padi!!e ty p e m in r from 21 to *0 second::. T in * ta b le slim v ii on pane 2>i w as th en d e rive d b y in te rp o la tio n from llit s e re su lts. Sirnbnsropic A lln rh m cn t (Natbina) bead Company T im e r). Fo r use nn the Slorm er Vise* *dmeter to accelerate and im prove the accuracy id liie paint consistency test at rotational speed of 200 r.p .m ., in accordance w ith A .S .T .M . standard method D-5G2, In w hich the rate of hear is adopted os a constant, am i Lho force reiiuirctl to produre this prescribed rate is accepted as a mc:isurc of consistency. Vcscribtd ip dricif under "Attaehmcnli," an pagt IS. 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