Document Ow4rwmD00K0B0gq1EY3OEXrv
FILE NAME: Johnson & Johnson (JAJ)
DATE: 1971 May
DOC#: JAJ044 DOCUMENT DESCRIPTION: Memo RE Assay of Talc in BABY POWDER with attached Data Analysis
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. H. A. Ful lar
. w.
. k . j. Mortimer to Mr. R. 8. Millar
. v. H. Shelley
. X, L. Suadbarg
Msusam
fir. G. Blldlok-fiaith
f--
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**Y 1*
4 v r
'
ffce attached lattar h o w the partila aise*ahap*
consists of a production batch of our product produced
in Pseamfeer. 1970. It in an aliquot of that which X
ffWe r n nr. A- hangar at Mt. Sinai Hospital. As you
Jiao* * i*ail ti* i i ho
Jgpa of ita ve can
expoet fro indapendsnt experto a va had aproad.
You vili nota that 99% of our product ia platy ban assayed on a aurfaca partila araa baaia. On tha othar hand 87% la platy than obaarved on a partida count basis., Xt ia aora uaual to run a partida count aaaay in tha business.
we consider the .faro* acaHtalo needles hut a trace# both on a< count and feta baaie. Whose partielee m m tremolite.
However, if such an assay vara to ha run Jay aicroacopista who ara not aware of tha differences between fibrous talc, broken talc plates* and traaolita wa can than expect then to report about 5.3* asadlas by count and at least 0.3% needles by area.
You vili not# wa are now picking up observable amounts of quarte in this particular batch. X bava no explanation for that at present.
o4A addition,to the etched x m m 0 x-i diffraetograph
6a
It shows these minarals are present}
|
talc, aica# chlorite. trssK<e-actiaolit*. and
k
magnesite.
7*
: I w proceeding to investigate samples of talc used during
* the past year as va discussed on Wednesday.
rap Attachment
W. H. Ashton
Protected Document-Subject to Protective Order
JNJAZ56_0000060TS
C olorado S chool of Mines R esearch I nstitute
P.O. Box 112
I
' G olden, Colorado 80401
I
1
May 10, 1971
Refer to
390517
Mr. Wm. Ashton
Johnson & Johnson
Research Center
Research and Development
'
New Brunswick; New Jersey 08901
Dear Mr. Ashton:
Following are the results of the point count analysis on sample 344L baby powder*
Free Particles
Flaty talc and/or chlorite
{with inclusions) F ree diamond shaped particles Free carbonates Free quartz
Free talc shards Free nontalc needles Free talc needles
Free other (0.0016 x 0.0016 mm)
Dark opaque Total
No. of Grains
434
% 87.32
5
1.01
7 . 1.41
8
1. 61
.14
2.82
3
0. 60
11
2.21
14
2.82
1
0. 20
M W
497 100.00
Cum sq mm
1.200355
%
99.10
Avg sq mm
0. 002765
0. 000148 0.001857 0.00323 6
0.004945
0.000081 0.000242
0.01
0.15 0. 27 0.41
. 0.01 0.02
0.000186 0.01 0.000215 0.02 1.211265 100.00
0.000030 0.000265 0.000404 ' 0.000353 0.000027 0.000022
0.000013 0.000215
Protected Document-Subject to Protective Order
JNJAZ65JW00M07
Mr. Wm. Ashton
, Johnson &Johnson
4P
CSMRI Project No. 390517
Page 2 ______________
Inclusions in Talc and/or Chlorite Plato:--
No. of % Grains
Cum
%
sq mm
Other (0. 0016 x 0.0016 mm) Talc needles Quartz Diamond shaped particles Talc shards Carbonates Nontalc needles
Total
1. 384 75 52 56
11
9 36 1, 623
85.28 4. 62 3. 20 3.45 0.68 0.55
2. 22 0 0 . 00
0.003719 0.002045 0.00 1639 0.000853
0.002894 0.000814
0.001521 0.013485
27.58 15.16 12. 15 6. 33
21.46 6. 04
.11.28 100.00
Avg sq mm
0.000003 0.000027 0.000032 0.000015 0.000263 0.000091 0.000042
Platy talc and/or chlorite
Total inclusions
(~)
1. 200355 = total platy talc and/or chlorite with inclusions
0, 013485 * total sq mm of inclusions . 186870 * total platy talc and/or chlorite
minus inclusions
On a cumulative sq mm basis, the talc and/or chlorit plates examined contained a total of. 1 .12% inclusions.
Following are explanations of th term s used in the above data tables.
1. The "inclusions" noted in the ta lc and/or chlorite plates were non opaque particles. No dark opaque particles were noted as inclusions.
2. The "diamond shaped particles" were nonopaque with a refractive index above the l. 600 oil used. Measurments of the internal angles of the crystals were close to 90 in all cases indicating they could be some variety of pyroxene.
3. The "carbonates" noted may include magnesite, dolomite or calcite.
Protected Document-Subject to Protective Order
JNJAZ65_OO0OO6O77
Mr. Wm. Ashton Johnson ft Johnson CSMRI Project No. 390517 Page 3 _____________
4. The "quartz" noted was identified using interference figures where possible. Where' not possible* due to size* concoidal fracture and interference colors were used for identification.
*
' 5. The "talc shards" noted w erethin pieces that could clearly be defined as being pieces broken off of plates* etc. This entailed very detailed study of each piece to determine if lamination or ragged edges were present.
6. The "nontalc" needles were identified as such if it was readily observable the particles were true needles and if they had extinction angles greater than 3 (usually 10*20).
7.. The "talc" needles were identified as such if it was readily observable the particles were true needles and if they had extinction angles of 3
' or less.
8. The "other (0.0016 x 0.0016 mm)" particles were nonopaque particles that had had refractive indices greater than the 1. 600 oil used. These
. particles were so sm all no other optical data could be procured from ' them.
The point count was made at 500X.
If you have any questions regarding this data, please call me.
Sincerely, '
M. G. Pattengill Project Engineer
/laj
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