SCHEME OF TESTING AND INSPECTION FOR CERTIFICATION OF SILVERED GLASS MIRRORS FOR GENERAL PURPOSES ACCORDING TO IS :

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1 Doc. STI 3438/4 December 1995 SCHEME OF TESTING AND INSPECTION FOR CERTIFICATION OF SILVERED GLASS MIRRORS FOR GENERAL PURPOSES ACCORDING TO IS : Laboratory A laboratory shall be maintained, which shall suitably be equipped and staffed where different tests shall be carried out in accordance with the method given in the specification. 2. Test Records - All records of tests shall be kept in suitable forms approved by the Bureau of Indian Standards. 2.1 Copies of any records or charts that may be required by the Bureau shall be made available at any time on request. 2.2 Quality Control - It is recommended that, as far as possible, statistical quality control (SQC) methods may be used for controlling quality during production as envisaged in this scheme [See IS 397 (Part I) : IS 397 (Part II) : 1985 and IS 397 (Part III) 1980]. 2.3 Quality System As far as possible, Quality Systems as per IS/ISO 9002:1994 shall be installed by the firm. 3. Standard Mark The Standards Mark as given in column (1) of the first schedule of the license shall be applied on each piece of silvered glass mirror; provided always that the container so marked is thus applied conforms to every requirements of the specification. 4. Marking In addition, each mirror shall bear a label affixed by the manufacturer giving the following information: a) Name of the manufacturer and trade mark, if any; b) Nominal thickness; c) Date of manufacture or code number to trace back the date of manufacture; d) Made in India if required; e) Quality of glass sheet used (see clauses 4.1); and f) Mirror may be badged if required by the purchaser. 5 Packing - Mirror shall be packed as agreed to between the purchaser and supplier. 6. The analysis and tests as indicated in Table 1 at the levels of control specified therein, shall be carried out on the whole production of the factory covered by this scheme and appropriate records and charts maintained in accordance with paragraph 2 above. All the production which conforms to the Indian Standards and covered by this license shall be marked with the Certification Mark of the Bureau.

2 6.1 On the basis of test and analysis results decision regarding the conformity or otherwise of a control unit for a given requirements shall be made as follows: Control Unit All the glass mirrors of the same thickness and manufactured essentially under the same condition and produced on the same day shall constitute a control unit Sampling Two samples shall be drawn at random from every 7 th control unit and tested for salt spray test, waviness and hot water test. If both the mirrors pass the requirements then only the remaining portion shall be tested for other requirements, otherwise the control unit shall be rejected without further testing and two samples from every subsequent control unit shall be tested for the characteristics in which failure has occurred until five consecutive control units are satisfactory where upon the original frequency of two samples from every 7 th control unit may be restored One sample shall be tested for silvering, copper coating and protective coating and shall satisfy the given requirements of the specification. If the sample fails in the requirements tested, the control unit shall be considered unfit for the purpose of marking The sheet glass employed in the manufacture of mirrors shall conform with requirements prescribed for AA & A qualities of IS A Certificate to that effect shall be necessary for each batch of sheet glass received. Otherwise each consignment of sheet glass shall be tested in the factory for determining conformity to IS and appropriate records maintained A control unit shall be marked only when it is found conforming to all the requirements of the specification. 7. Raw Materials It is recommended that routine analysis of each consignment of raw materials, received in the factory and used in manufacture shall be carried out and appropriate records maintained. 8. In respect of all other clauses of the specification and at all stages of manufacture, the factory will maintain appropriate controls and checks to ensure that their product conforms to the requirements of these specification. 9. Rejection - A separate records shall be maintained giving information relating to the rejection due to any reason and method of their disposal. Such material, in no case, be stored together with that conforming to the specification and to be used for repacking. 10. Samples The licensee shall supply, free of charge, the samples required in accordance with the Bureau of the Indian Standards (Certification) Regulations, 1988, from his factory or godown. The BIS shall pay for the samples taken by it from the market

3 11. Replacement Whenever a complaint is received soon after the goods with Standard Mark have been purchased and used, and if there is adequate evidence that the goods have not been misused, defective goods shall be replaced free of cost by the licensee in case the complaint is proved to be genuine and the warranty period (Where applicable) has not expired. The final authority to judge conformity of the product to the Indian Standards shall be with BIS. 12. Stop Marking The marking of the product shall be stopped under intimation to the BIS if, at any time there is some difficulty in maintaining the conformity of the product to the specification, or the testing equipment goes out of order, or if directed to do so by BIS for any reason. The marking may be resumed as soon as the defects are removed or when BIS gives the permission to do so. The information regarding resumption of marking shall also be sent to the BIS. 13. Production Data The licensee shall send to the BIS, as per the enclosed Performa a statement of quantity received, the particulars of the supplier from whom Standard Marked Waterproofing compound is received, quantity repacked, marked and exported by him and the trade value thereof during the half year ending 30 June and 31 December. This statement is required to be forwarded to the BIS on or before 31 st day of July and January for preceding half-year.

4 Clause IS : SILVERED GLASS, MIRRORS FOR GENERAL PURPOSE TABLE 1 LEVELS OF CONTROL (Para 6 of the Scheme of Testing and Inspection) TEST DETAILS LEVELS OF CONTROL Test Method Requirements Clause Reference No. of Samples Lot Size 4.1 Glass sheet AA & A IS: Every tenth piece* 4.2 Silvering Annex A IS: One piece -- One control unit Copper coating --do-- --do-- One piece --do Protective coating 4.4 & do-- Each piece --do Reflectance Annex B --do-- Two piece --do Test for waviness 5.1 to do-- Two piece 7 th control unit Remarks i) The first sample piece in a day s production may be chosen at random from among the first ten pieces ii) Also see clause 6 and clauses of the Scheme See Cl Salt Spray Test Annex C --do-- Two piece --do-- --do Hot Water Test Annex D --do-- Two piece --do-- --do Copper & silver plating 5.4 & do-- One piece One control unit See Clauses * If in the course of inspection one sample mirror fails to satisfy the thickness requirement, each of the mirrors produced thereafter shall be tested for thickness till 20 consecutive mirrors pass the test. Ten percent inspection shall be resumed only after the above condition gets fulfilled. + See Clauses 6 and of the Scheme.

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