Table Of Contentइंटरनेट मानक
Disclosure to Promote the Right To Information
Whereas the Parliament of India has set out to provide a practical regime of right to
information for citizens to secure access to information under the control of public authorities,
in order to promote transparency and accountability in the working of every public authority,
and whereas the attached publication of the Bureau of Indian Standards is of particular interest
to the public, particularly disadvantaged communities and those engaged in the pursuit of
education and knowledge, the attached public safety standard is made available to promote the
timely dissemination of this information in an accurate manner to the public.
“जान1 का अ+धकार, जी1 का अ+धकार” “प0रा1 को छोड न’ 5 तरफ”
Mazdoor Kisan Shakti Sangathan Jawaharlal Nehru
“The Right to Information, The Right to Live” “Step Out From the Old to the New”
IS 13528 (1992): Pretanning syntans [CHD 17: Leather,
Tanning Materials and Allied Products]
“!ान $ एक न’ भारत का +नम-ण”
Satyanarayan Gangaram Pitroda
““IInnvveenntt aa NNeeww IInnddiiaa UUssiinngg KKnnoowwlleeddggee””
“!ान एक ऐसा खजाना > जो कभी च0राया नहB जा सकता हहहहै””ै”
Bhartṛhari—Nītiśatakam
“Knowledge is such a treasure which cannot be stolen”
Indian Standard
PRETANNING SYNTANS-SPECIFICATION
UDC 675041
@ BIS 1992
BUREAU OF INDIAN STANDARDS
MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG
NEW DELHI 110002
December 1992 Price Group 2
Tanning Materials and Allied Products Sectional Cornmitt+, CHD 018
FOREWORD
This Indian Standard was adopted by the Bureau of Indian Standards, after the draft finalized by the
Tanning Materials and Allied Products Sectional Committee had been approved by the Chemical Division
Council.
The pretanning syntans are of moderate astringency and are largely used as pretanning agents for light,
medium and heavy leathers, which are to be vegetable tanned. These syntans accelerate the penetration
of the tannins, facilitate better exhaustion of the liquors and bring about light coloured leathers.
Since these syntans are meant mainly for pretanning, the tannin content is of no particular importance
and hence concentration alone is taken into consideration.
For the purpose of deciding whether a particular requirement of this standard is complied with, the final
value, observed or calculated, expressing the result of a test or analysis, shall be rounded off, in accordance
with IS 2 : 1960 ‘Rules for rounding off numerical values ( revised )'. The number of significant places
retained in the rounded off value should be the same as that of the specified value in this standard.
4 SI 13528 : 1992
Indian Standard
PRETANNING SYNTANS-SPECIFICATION
1 SCOPE Table 1 Requirements for Pretanuing
Syntans
sihT dradnats sebircserp the stnemeriuqer dna
sdohtem of gnilpmas dna test for snatnys for ( Clause4 .2 )
gninnaterp of srehtael ot eb elbategev .dennat
2 SECNEREFER Sl Characteristics Require- Method of
No. ments Test, Ref to
ehT naidnI sdradnatS detsil woleb are the -secen Cl No. of
#-----*---1
yras stcnujda ot siht :dradnats :
Annex IS 13271
A 1992
IS No. Title
)1( )2(
1640 : 1960 yrassolG of smret gnitaler ot (3) (4) (5)
)i
,sedih sniks dna rehtael Total solid residue.
percent by mass;
4905 : 1968 Methods for modnar gnilpmas
Min
:17231 1992 snatnyS - Methods of test Powder 95.00 - 8
Liquid 30’00
3 YGOLONIMRET
ii) Moisture, percent
by mass, Max
roF the esoprup of siht ,dradnats the snoitinifed
nevig ni SI 1640 : 1960 llahs eb .dewollof Powder 5’00 - 7
Liquid 70.00
4 TNEMERIUQER iii) Iron ( as Pesos ),
percent by mass 0.03 - 15
4.1 Description Ml7.V
ehT lairetam llahs eb ni the mrof of powder or iv) fi,H ( of 10 percent 3.0-3’5 A-l -
solution )
.diuqil
4.2 ehT lairetam llahs osla ylpmoc htiw the
stnemeriuqer nevig ni elbaT 1, nehw tested NOTE - The following corrections shall be incorpora-
ted while calculating the total solid content for liquid
gnidrocca ot the sdohtem nevig ni co1 4 of the
syntans:
.elbat
Total solid, percent
by mass = -s x .-EE x 100
5 GNIKCAP DNA GNIKRAM Ml 50
5.1 Packing where
sselnU esiwrehto agreed ot neewteb the resahcrup Mt = corrected mass in g of the material left after
dna the ,reilppus the lairetam llahs eb packed ni drawing
foorperutsiom sreniatnoc hcus as ynnug sgab =(W-B)+C,
ylbatius denil htiw foorperutsiom papers or
Ml = mass in g of the material taken for the test,
enelyhteylop .sgab
w =
mass in g of the material left after dpying,
5.2 Marking B = wt. in g of sodium
ehT sreniatnoc llahs eb yleruces desolc dna raeb = V x N x 0’023,
ylbigel dna ylbiledni the gniwollof :sralucitrap
V = Volume of (N) Sodium Hydroxide solution
4 emaN of the ;lairetam added, and
b) noitacidnI of the ecruos of :erutcafunam C = wt. in g of hydrogen
cl ssorG dna ten ;ssam = Vx N x 0’001.
d) Date of ;erutcafunam dna 6 GNILPMAS
e) Batch .rebmun
ehT dohtem for gniward evitatneserper selpmas
5.2.1 ehT sreniatnoc yam osla eb dekram htiw for test dna the airetirc for ytimrofnoc llahs eb as
dradnatS Mark. debircserp ni xennA .B
1
SS I3528 : 1992
ANNEX A
( Clause 4.2 and Table 1 )
METHOD OF TEST FOR PRETANNING SYNTANS
A-l DETERMINATION OF @H A-l.2 Procedure
A-l.1 Apparatus Determine the #H of 10 percent solution (W/V)
prepared in accordance with 6 of IS 1327 1 : 1992,
A-1.1.1 pH Meter - with glass electrode. by using a suitable pH meter,
ANNEX B
( Clause 6 )
METHOD OF SAMPLING FOR PRETANNING SYNTANS
B-l LOT B-2 PREPARATION OF TEST SAMPLES
All the containers of the same capacity containing Shake/mix well each of the containers selected
pretanning syntans manufactured from the same in B-1.1. From each of the containers a represen-
material under similar conditions of production tative portion of the material sufficient to carry
shall constitute a lot. out tests as given in B-3 shall be taken out.
B-l.1 Sample shall be tested from each lot sepa-
B-2.1 Out of the portions collected from each of
rately for ascertaining conformity of the material
the selected containers, an equal quantity of the
to the requirements of the specification. The
material shall be taken out and mixed thoroughly
number of containers to be selected from each
to form a composite sample. The composite sample
lot (n) shall depend on the size of the lot (N) and
so formed shall be divided into three equal parts,
shall be as given in Table 2.
one for the purchaser, another for the supplier
Table 2 Number of Containers to be and the third for the referee.
Selected for Sampling
B-2.2 The remaining portion of the sample from
each container shall be divided into three equal
Lot Size Number of Constant R/U-L parts and each such separate part shall constitute
COLxfbi F a ‘Kct’ or an individual sample. One set of individual sample
Selected ( representing the n containers selected ) shall be
V) (n) marked for the purchaser, another for the supplier
and the third for the referee.
(1) (2) (3) (4)
up to 150 3 0.6 0.8
B-2.3 All the individual and composite samples
151 to 300 4 O-5 0.8 shall be immediately transferred to separate glass
301 and above 5 0’5 0’9 bottles and shall be labelled with full identifica-
tion particlars of the samples,
B-l.2 These containers shall be selected at ran-
dom from the lot, For this purpose, reference may B-2.4 The referee sample shall bear the seal of
be made to IS 4905 : 1968. If such a random both the purchaser and the supplier. These shall
number table is not available, the following pro- be kept at a place agreed to between the pur-
cedure may be adopted: chaser and the supplier and shall be used in case
of dispute between the two.
Starting from any container count 1, 2, 3 . . . . . . .
etc, up to Y and so on in a systematic manner
and withdraw the rth container, r being the B-3 NUMBER OF TESTS
integral part of N/ n; where Jv is the total
number of containers in the lot, and n the B-3.1 Test for @H value shall be performed on
number of containers to be selected according individual samples.
to Table 2. Every 7th container thus counted
shall be selected till the required sample size is B-3.2 Tests for the remaining characteristics shall
obtained. be conducted on composite samples.
2
f IS 13528 : 1992
B-4 CRITERIA FOR CONFORMITY where .ii is the mean of all, R is the range, L and
U are the lower and the upper specification limits
B-4.1 For Individual Sample for flH value, and k is a constant factor given in
Table 2.
B-4.1.1 For pH Value
B-4.2 For Composite Sample
The lot shall be considered as conforming to this
requirement if all of the following conditions are A lot shall be declared as conforming to the
satisfied: requirements for the remaining characteristics if
the test results satisfy the requirements prescribed
a) Rl( u-- L ) s$ the value given in col 4 of in Table 1.
Table 2
B-4.3 The lot shall be deemed as conforming to
b) (z+kR)gU
the requirements of this standard if B-4.1
c) ( 8 - kR ) > L and B-4.2 are satisfied.
Standard Mark
ehT esu fo eht dradnatS kram is denrevog yb eht snoisivorp fo eht Bureau of Indian
Standards Act, 1986 and eht seluR and snoitalugeR edam .rednuereht ehT dradnatS Mark no
stcudorp derevoc yb an naidnI dradnatS syevnoc eht ecnarussa that yeht evah neeb
decudorp ot ylpmoc htiw eht stnemeriuqer fo that standard rednu a llew denifed metsys fo
,noitcepsni gnitset and ytilauq lortnoc hcihw is desived and desivrepus yb SIB and detarepo
yb eht .recudorp dradnatS dekram stcudorp era osla ylsuounitnoc dekcehc yb SIB rof -noc
ytimrof ot that standard as a rehtruf .draugefas sliateD fo snoitidnoc rednu hcihw a ecnecil
rof eht esu fo eht dradnatS Mark yam eb detnarg ot srerutcafunam ro srecudorp yam eb
deniatbo morf eht uaeruB fo naidnI Standards.
Barea of naidnI rdrsdutS
SIB is a yrotutats noitutitsni dehsilbatse rednu eht ot etomorp
Bureau of Indian Standards Act, 1986
suoinomrah tnempoleved fo eht seitivitca fo ,noitazidradnats gnikram and ytilauq noitacifitrec fo sdoog
and gnidnetta ot detcennoc srettam ni eht .yrtnuoc
Copyright
SIB has eht thgirypoc fo all its .snoitacilbup oN trap fo eseht snoitacilbup yam eb decudorper ni yna
mrof tuohtiw eht roirp noissimrep ni gnitirw fo .SIB sihT seod ton edulcerp eht eerf ,esu ni eht esruoc fo
gnitnemelpmi eht standard, fo yrassecen ,sliated hcus as slobmys and ,sezis epyt ro edarg .snoitangised
seiriuqnE gnitaler ot thgirypoc eb desserdda ot eht rotceriD ( snoitacilbuP ,) .SIB
Revision of Indian Standards
naidnI Standards era deweiver yllacidoirep and ,desiver nehw yrassecen and ,stnemdnema fi ,yna era
issued morf emit ot .emit sresU fo naidnI Standards dluohs niatrecsa that yeht era ni noissessop fo eht
tsetal stnemdnema ro .noitide stnemmoC no this naidnI dradnatS yam eb tnes ot SIB gnivig eht
of gniwoll :ecnerefer
toD : .oN DHC 018 ( 0087 )
Amendments Issued Since Publication
dnemA .oN etaD fo lssue txeT detceffA
BUREAU OF INDIAN STANDARDS
Headquarters:
Manak ,navahB 9 rudahaB Shah rafaZ Marg, weN ihleD 110002 Telegrams : Manaksanstha
Telephones : 331 0131, 331 13 75 ( Common to all offices )
Regional Offices : Telephone
Central : Manak Bhavan, 9 Bahadur Shah rafaZ Marg 331 01 31
NEW DELHI 110002 ( 331 13 75
Eastern : 1 14 C. I. T. Scheme VII M, V. I. P. Road, Maniktola 37 84 99, 37 85 61
d ALCUTTA 700054 37 86 26, 37 86 62
t
Northern : SC0 445-446, rotceS 35-C, CHANDIGARH 160036 53 38 43, 53 16 40
I 53 23 84
Southern : C. .I .T Campus, IV Cross Road, MADRAS 600113 235 02 16, 235 04 42
t 235 15 19, 235 23 15
Western : Manakalaya, E9 MIDC, Marol, Andheri ( East )
632 92 95, 632 78 58
BOMBAY 400093 1 632 78 91, 632 78 92
Branches : AHMADABAD. BANGALORE. BHOPAL. BHUBANESHWAR.
COIMBATORE. FARIDABAD. GHAZIABAD. GUWAHATI. HYDERABAD.
JAIPUR. KANPUR. LUCKNOW. PATNA. THIRUVANANTHAPURAM.
C
