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FOREWORD

This Indian Standard was adopted by the Bureau of Indian Standards, after the draft finalized by the Stationery and Allied Products Sectional Committee had been approved by the Chemical Division Council.

Indelible ink is used for marking votgr's fingers during elections - mav be panchayat/municipal, district or state level. This standard IFas been formulated so as to have uniformity in quality of this product.

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 OT value shall be the same as that of the specified value in this standard.

1 SCOPE
This standard prescribes the requirements and methods of sampling and test for indelible ink used for marking voter's fingers with a suitable applicator.

2 REFERENCES
The Indian Standards listed below are the necessary adjuncts to this standard:

3 REQUIREMENTS

3.1 General
The ink shall be based on dyes, which shall not irritate the skin and be free from any harmful effects.

3.2 Description
The product ( ink ) shall be in the form of a solution. It shall transfer freely from the applicator and adhere perfectly to the skin after application. It should be clearly visible. It shall be free from sediments.

3.3 Colour
The ink shall be of any colour, as agreed to between the purchaser and the supplier. Normally it is tinted violet to make it visible, when applied.

3.4 Acidity
The pH of the solution shall not be less than l'O and more than 3'0 when tested with a suitable pH meter.

3.5 Total Solids
The material shall contain total solids of not less than 10 g per 100 ml, when tested by the method prescribed in Annex A.

3.6 Development
The marking made on the skin by the material, when exposed to air shall dry completely within 40 seconds and shall not smudge, pick up or smear
when rubbed after drying and shall retain the marking after washing with water and soap.

When tested as prescribed in Annex B, the marking made by the material shall remain unaffected.

3.7.2 Resistance to Organic Solvents
When tested as prescribed in Annex C, the mark-
ing made by the material shall remain unaffected.

3.8 Keeping Quality
The material, when stored away from direct sunlight and in amber coloured bottles, shall continue to satisfy the requirements as given in 3.2, and 3.5 to 3.7, for a minimum period of one year from the date of manufacture.

4.1 Packing
The material shall be packed in containers made of amber coloured glass or any other suitable material as agreed to between the purchaser and the supplier.

5.SAMPLING
The method of drawing representative samples of the product and the criteria for conformity shall be as prescribed in Annex D.

6 TESTS
6.1 Tests shall be carried out by the methods prescribed in Annexes A to C.

6.2 Quality of Reagents Unless specified otherwise, pure chemicals and distilled water ( see IS 1070 : 1977 ) shall be used in tests.

NOTE: 'Pure chemicals' shall mean chemicals that do not contain impurities which affect the results of analysis.

Evaporate on a steam bath 10 ml of ink in a tared porcelain, silica or platinum basin. Dry in an airoven maintained at 105 ± 2'C. Cool the residue in a desiccator and weigh. Repeat the operation till constant mass is obtained.
A-2 CALCULATION

Total solids, percent (mlv) - 100 m where
M - mass, in g, of the residue after (-irying,and
V - volume, in ml, of the ink taken for the test.

B-1.1 Bleaching Powder Suspension - containing 2 g of available chlorine per litre, prepared when required. The use of the bleaching powder stable (see IS 1065 : 1989 ) is also rem,ommcnded.

B-1.2 Dilute Hydrochloric Acid - approximate I percent.

B-1.3 Soap Solution - Dissolve 20 g of suitable dry toilet soap ( see IS 2888 : 1983 ) in one litre of water.

B-2.1 Mark the lower part of the nail and the adjoining skin of the thumb and middle finger with more or less identical marks with the ink under testing by means of an applicator, made of glass/ plastic and 2 to 3 mm thick. Allow the marked fii)gers to dry for a minute. At the end of the period, the marking should be clearly visible.

B-2.2 Prepare a cotton swab with the bleaching powder suspension. Remove the excess liquid from the swab by slight squeeze. Gently rub the marked area on the thumb with the wet swab 5 times There shall not be any appreciable difference in the intensity of marked area on the thumb from that onthe middle finger. I

B-2.3 Swab the marked area of the thumb 5 times, successively with warm soap solution ( 50 C ), dilute hydrochloric acid and finally with water. Rinse and wipe the hand dry. There shall be no difference in the intensity of marking on the thumb and middle finger.

ANNEX C

( Clause 3.7.2 )

TEST FOR RESISTANCE TO ORGANIC SOLVENTS

C-1 REAGENTS

C-1.2 Petroleum Hydrocarbon - 90/135 ( see IS 1745 : 1978 ).
C-1.3 Trichloroethylene - t see IS 245 : 1970 ) containing 0'5 percent water.

C-2 PROCEDURE

Prepare cotton swabs with rectified spirit petroleum hydrocarbon and trichloroethylene. Gently rub the marked portion of the thumb with each swab successively. There shall not be any difference of intensity of the marking of the thumb and the forefinger in each case.

All containers of the same size and capacity and containing ink of the same colour and composition shall be grouped together to form a lot.

Each lot shall be tested separately for the various; requirements of the specifications.

The number of containers to be selected for the sample shall be as given in Table 1.

These containers shall be selected at random from the lot as per IS 4905 : 1968.

D-3 PREPARATION 014' TEST SAMPLES
From each of these selected containers a representative portion of material shall be taken, which shall be sufficient for carrying out tests for all characteristics given in the specification.

D-3.1 Composite Sample
Out of these portions, a small but equal quantity of material shall be taken and mixed thoroughly to make a composite sample.

D-3.2 Individual Sample
The remaining portion of the material from each selected container shall constitute an individual test sample.

D-4 NUMBER OF TESTS
Tests for description, resistance to bleaching and resistance to organicsolvents shall be performed on individual samples. The test for all other characteristics shall be conducted on composite sample.

D-5 CRITERIA FOR CONFORMITY
The lot shall be deemed to conform to the specifications if all test results according to D-4 satisfy the corresponding requirements.

The use of the Standard Mark is governed by the provisions of the Bureau of Indian Standards Act, 1986 and the Rules and Regulations made thereunder. The Standard Mark on products covered by an Indian Standard conveys the assurance that they have been produced to comply svith the requirements of that standard under a well defined system of inspection, testing and quality control which is devised and supervised by BIS and operated by the producer. Standard marked products are also continuously checked by BIS for conformity to that standard as a further safeguard. Details of conditions under which a licence for the use of the Standard Mark may be granted to manufacturers or producers may be obtained from the Bureau of Indian Standards.

BIS is a statutory institution established under the Bareau of Indian Stanjards Act, 1986 to promote harmonious development of th- activities of standardization, marking and quality certification of goods and attending to Connected matters in the country.

BIS has the copyright of all its publications. No part of these publicatioas may be reproduced in any form without the prior permission in writing of BIS. This does not preclude th c free use,in the course of implemei-iting the standard, of necessary details, such as symbols and sizes, type or grade designations. Enquiries relating to copyright be addressed to the Director ( Publications ), BIS.

Indian Standards are reviewed periodically and revised, when necessary and am.-n dments, if any, are issued from time to time. Users of Indian Standards should ascertain that th ey are in possession of the latest amendments or edition. Comments on this Indian Standard may be sent to BlS giving the following reference:

Headquarters:
Manak Bhavan, 9 Bthadur Shah Zafar Marg, New Delhi 110002
Telephones : 331 01 31, 331 13 75 Telegrams : Manaksanstha
(Common to all Offices)

Central : Manak Bhavan, 9 Bahadur Shah Zafar Marg 3110131NEW DELHI 110002 331,13,75

Eastern : 1/14 C. 1. T. Scheme VII M, V. 1. P. Road, Maniktola 37,86,62 CALCUTTA 700054

Northern : S4tO 445-446, Sector 35-C, CHANDIGARH 160036, 53,38,43

Southern C. 1. T. Campus, IV Cross Road, MADRAS 600113 ,235, 02, 16

Western Manakalaya, E9 MIDC, Marol, Andheri ( EIst ) 6,32,92,95 BOMBAY 400093

Branches: AHMADABAD, BANGALORE, BHOPAL, BHUBANESHWAR, COIMBATORE, FARIDABAD, GHAZIABAD. GUWAHATI, HYDERABAD, JAIPUR, KANPUR, PATNA, THLRUVANANTHAPURAM .