Document 4vpjMwa8E0kNwERVM7VNg3V6G
EC U F O L O G I C A L
SE-. R V I C B
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P a in t T u l ln e Hu' lit w|i1i ulnoprfml m rla l flrilt* li*r iiluih'rm .
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PAINT TKSTINC OUTFIT
T C S T IM iO C K D G K i:
1. Mi x tin* priml wimple thnrmiclily ml strain it Into the cmitninrr. Urine the lrni[ii"rlMri* <*f IIif* ramplir It* 2."'' iO .Iy 'C and maintain il sit th a t tem perature Jnrine the test.
2. 11** fwilnlner on the metal plate or the platform and rsiisi* until the [addle type r<lor h centrally mnier.srri in Uto ample to the mark inscribed on the rlr haft.
* K.ir (iMMiiltiri* nn>1 r>|wrl o f le a l '"'i l l , v /l
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Kill.1. ( `nnafrofttaniMl, p p .
** I Irlntiii.lly ti (i'fU ly in ' '!* W`M w-mi) In pulnl I'Ini' |iulfl|a, tUl h u t i r n placed !)' 0a u!)inrf(vd p i l<|li< )!> w hlili c l' w ntofa irpfoJiiill-lii m u ll* .
A R T H U R H . 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 .
^19237
T K C H N O 1/ O c; I C A
s KUV CK
X
U&O ir i d 9
T. flrin rc s ta r iing Un* tesi, n*|ea*e Ibi* lirait** nini ritiri; Mit* immh**r of rvolu lions
of lin* ro to r it from 2 1 w unii:;, ne inrasnred by a
i*!i- Usine different
w eighls. dterm ine th r tin* rrquired for 100 rvolutions of lhe rotor. S rb-r; w right s
(Im i xvill ('.ve til I**;ist 1tvo rcuuiug v ilb in a rang** of 27 lo -Tl srru n d s. Tlw-se <!*!T--
m inaim us shntdd be nmd** froiu a rm m ing sla rl, th a is, lin* rotor should lu- allnwed
lo malti* tif. leasl 10 ri'X'nbilifms befnre llir tim ing of liti* tosi is slu rted . D term in,
by plot line or inter pillatimi. (lie* xveight in Kfitins m w ^ i r y l prudore 10(1 rvolu
tions of lite ru lo r in 10 seconds.
DISCUSSION
Krebs Units nml Use of Krebs' S tunner ( 'barf," Many paint manufacturers bax*e adopted Krel*s Unit r:iti:i|;ii as drtived from fin* Krebs' S tu n n er (.'hart, for classifying III'? eimsivleiiry of paints. T be cbnrl. as slmv.'ii mi page 2*1, tubulates lb " driving weight ill grams og'iUi:;l.l1;r lime in second:; for I revolutions of tbe paddle.
T b e sani" prm*,d*ne is billowed as milliard above, taking rare to maintain the tem perature of llie rarr.pl e at. VC i li.2f> C.
The number of Krebs f o i l s is round simply by reading in 1be appropriate line and eobi!Mii. T hus. if Kin gram s cnreiil l!u* paddle to make 1(1 revolutions in i'J seconds. Ilm material under IcM would have tie' consistency >f 112 Krebs Units. A painl eonsirliTed to lie of proper brushing consistency has liren given lie* arb itra ry value of lO'l Krebs Units. Additional paints, both tkiekrr and tliiuner than tin., standard, were Ihen prepared and. of ibi-se, certain ones were selected to differ in eoasisleney by arbilrarily given xallies of IP Krebs Units using the nn<t!ilied SlnruoT 1'aint Testing Oullil. Umrdsl ency of paints varying from tit* to IHU Ktebs Units was then measured. Sufficient weights were em phnnl inr each sample to vary the time required for IDO r*'Vnliilioas of |)ie paddle type rotor from 21 to ;(> seconds. The table slimvu on page 2d was then derived by interpolation from tins results.
K!rhovro;ric AHacbmont (National l.ead Company Tim er). For use on the Stunner Viscnsinn.'ter to accelerate and improve the accuracy of the paint consistency lest at rotational speed of 2(10 r.p.m., in accordance xvith A.S.T.M. standard method D-5G2, In fi'inch the rate of shear is adopted as a constant, and the force required to produce this prescribed rate is accepted as a measure of consistency. Dcrcr......................* under `'Atfachtrttn/g," on page IS.
KREDS* STORMER CHART >VITIt INTERPOLATIONS
U tlrlng W rtcM In ( it im i
Urtami* l'ut 109
73 100 123 ISO173100225230 276 ino321.150178 100125 Un173nero.126.150iTr600621UEO*71 700711110773800B23RIO975spn950 IOOO
Heratitllnna
Il.......... 42 62 (S 2:........... ir. .vi *t- 60 2G.......... 17 66 0
75 70 78
9.1 84
mi pn
95 93
95 ... 91 ... 96
9P 1(91 IUI
in KIUM3
1in0:9* tIO
III 11Z 113
115 un
ht
118 122 MP 122 isn ... 123
ita it:. 12c
128 129 130
no ni 132
132 1.13 131
13 137 138
37.......... sjnu.................... 30.......... 31.......... 33.......... Sii..........
49 r.T r.i 09 74 79 83 80 89
SSII r,4 D se
69 OD r.i I2 n;l
66 00 UT 00 69
70 71 72 7.1 74
7S 70 77 78 79
80 HI 82 82 83
84 H5 90 96 87
H? 988J1 !>0 PO
90 91 92 J3 9.1
r.7 r.i 70 76 HO RI 91 91 91
02 93 91 95 95 no 90
99!99tIi50.9f7Hi IM1W9Pi0lH'H7!)11M111110000I91O22311111l1u0000023127i1111i11n10000117e57'! iHt1inmo(I1iT7i*; Knn1nit1ioo0iPi 111M1111111122233
113 Il ! Ili 1n1r1. 116
li*Idi 103 1117117109 112 Il 1116
tu 115 116 116 ni: Mt: 117
116118 120 121 123
117 119 120121 123
111 1IP121 lW121
MRtill MR120
121 122
!|4|!ll
121 125
MR120 MP 121
1|*2M21112233
.23 125
121 120
121 126
125 127
12-5127
126 129
126 12(
1li2a8
it: 11227."
I122P? 1n3o0 130 mi
129 innni
12P131 132
12- 111 132
129 131 132
ni 132 ni 132 1.12ni 133 ni 133 131 133 ni 134 Iris
133 IXI 131 135 nr. 135 136
ni 31 135 1:0. no 136 t:iT
IP118 137 139 137 133 US 140 UH140 UH140 I3P: 11
34.......... Ni 61 35.......... r.a 06 31.......... co 00 37.......... 01 07 3n.......... G3 no 39.......... 02 08 40.......... 03 00
76 70 76 77 78
81 HI 97 |U2 Kit; IKI
87 M 9H 102 10'i Ho
85 t* 92 111 80 93 ... 119
103 l(l:l
107 PII
III III
87 03 ini 101 109 112
III 111 nr, 11.7 in;
118 118
Q<** 121 127 ta!! 121 ... 127
120 i:ni
1.12 I3t 133 arnr.
IH l.li
141 113
MR 122 125 I2H 139 133 -a136 117 142
119 MP
123 123
12-7 126
128 K!!'
131 .. 131
1.13 131
**1. 11.31-6;
(U3H9
142 112
79 79
81 .. . 91 89 01
ton 1181
IDI KM
IUH IP
12 112
iuhn;
1211 121 I2U 121
126 129 till 127 ... r::u 132
131 116 134 136
lI;J|RR
143 143
i 1 1 1 i 11
i 1
! \1 11I 1 I 1a1p i
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