IS 303:1989

including the tested sample. b) However, if plywood with superior surface quality is tested then lower appearance type may also be covered. 4. The Firm shall declare the varieties of plywood they intend to cover in the Licence. The Scope of Licence may be restricted based on the Manufacturing capability and Testing facilities of the Manufacturer. 5. During the operation of the Licence, BO shall ensure that all the Varieties covered in the Licence are tested in rotation to the extent possible. PM/ IS 303/ 2/ JULY 2020 3

PM/ IS 303/ 2/ JULY 2020 BUREAU OF INDIAN STANDARDS Manak Bhawan, 9, Bahadur Shah Zafar Marg, New Delhi – 110002 1 PRODUCT MANUAL FOR PLYWOOD FOR GENERAL PURPOSES ACCORDING TO IS 303: 1989 This Product Manual shall be used as reference material by all Regional/Branch Offices & licensees to ensure coherence of practice and transparency in operation of certification under Scheme-I of Bureau of Indian Standards (Conformity Assessment) Regulations, 2018 for various products. The document may also be used by prospective applicants desirous of obtaining BIS certification licence/certificate. 1. Product : IS 303 : 1989 Title : Plywood for General Purposes No. of Amendments : 6 2. Sampling Guidelines: a) Raw material : a) Adhesive – IS 848 b) Extenders – IS 1508 b) Grouping guidelines : Please refer ANNEX – A c) Sample Size : Plywood – 1 sheet 3. List of Test Equipment : Please refer ANNEX – B 4. Scheme of Inspection and Testing : Please refer ANNEX – C 5. Possible tests in a day : Please refer ANNEX – D 6. Scope of the Licence : “Licence is granted to use Standard Mark as per IS 303 : 1989 with the following scope: Name of the product PLYWOOD FOR GENERAL PURPOSES Grade BWR/MR Type AA/AB/BB Size Upto and including _____ ply and _____ thickness. PM/ IS 303/ 2/ JULY 2020 2

Grouping Guidelines 1. Plywood for general purposes are classified based on the parameters as given below: a) Grade: BWR and MR b) Types based on appearance: AA, AB and BB c) Number of ply : 3,5,7,9,11 and above d) Thickness based on number of ply: 3 mm to 25 mm and above, and e) Any dimensions as agreed to between the manufacturer and the purchaser are also permitted in addition to the standard dimensions. 2. Requirements for BWR grade is stringent than MR grade plywood, but Mycological test is applicable only for MR grade. Based on appearance type, requirements for type AA is more stringent. Also for manufacturing of more number of ply and plywood of higher thickness, manufacturing capacity and infrastructure required is more critical than plywood with less number of ply and thickness. 3. Considering the above, following grouping guidelines for GoL/CSoL have been developed: a) One sample of any appearance type AA/AB/BB with highest ply, highest thickness and any size for each grade (BWR and MR) shall be tested for all requirements to cover plywood of the appearance type tested and with number of ply and thickness upto and

List of Test Equipment Major test equipment essentially required to test as per the Indian Standard Sl. No. Tests used in with Clause Reference Test Equipment 1 Dimensions, Squareness and Edge Straightness (Clause 8) Measuring Tape Steel Scale Micro Meter Vernier Caliper Squareness Gauge Straight Edge Feeler Gauge 2 Static bending test (MOE and MOR Test) (Clause 11.4) Tensile Testing Machine attached with MOE and MOR attachments and 100 mm. dial gauge 3 Mycological Test (Clause 11.2.2) Enameled Mycological Tray with Sucrose / Saw Dust 4 Water resistance test (Clause 11.2.1) Water Bath fitted with digital temperature controller, Knife as per ISS, Stout Table 5 Moisture content (Clause 11.3) Hot Air Oven - thermostat controlled and fitted with thermometer Moisture Meter 6 Adhesive testing (Clause 6.2 ) pH Meter IS Sieve 7 General test equipments required Humidity Chamber with thermometer & hygrometer Desiccator Air Conditioner Dry-Wet Thermometer Electric Hot Plate Chemicals and glassware Viscosity Cup The above list is indicative only and may not be treated as exhaustive. PM/ IS 303/ 2/ JULY 2020 4

Scheme of Inspection and Testing 1. LABORATORY - A laboratory shall be maintained which shall be suitably equipped (as per the requirement given in column 2 of Table 1) and staffed, where different tests given in the specification shall be carried out in accordance with the methods given in the specification. 1.1 The manufacturer shall prepare a calibration plan for the test equipments. 2. TEST RECORDS – The manufacturer shall maintain test records for the tests carried out to establish conformity. 3. LABELLING AND MARKING – As per the requirements of IS 303: 1989 4. CONTROL UNIT – All plywood boards of similar construction, grade and type pressed under similar conditions continuously with same mix of adhesive in one press in a day shall constitute a control unit (Plywood Boards in which the arrangement of veneers is similar as regards thickness and species of timber on both sides of central ply shall be considered to be of similar construction). 5. LEVELS OF CONTROL - The tests as indicated in column 1 of Table 1 and the levels of control in column 3 of Table 1, shall be carried out on the whole production of the factory which is covered by this plan and appropriate records maintained in accordance with paragraph 2 above.

5.1 All the production which conforms to the Indian Standards and covered by the licence should be marked with Standard Mark. 6. REJECTIONS – Disposal of non-conforming product shall be done in such a way so as to ensure that there is no violation of provisions of BIS Act, 2016. PM/ IS 303/ 2/ JULY 2020 5 TABLE 1 (1) (2) (3) Test Details Test equipment requirement R: required (or) S: Sub-contracting permitted Levels of Control Cl. Requirement Test Methods Clause Reference No. of Sample Frequency Remarks 5.1 Classification by appearance 5.1 IS 303 R All - - 5.2 Table 1, Table 2 Quality requirements of surface and number of defects 5.2 IS 303 R All - The visual inspection shall be carried out in a well-lighted place. 6.1 Timber 6.1 IS 303 - One Each lot received Record of each lot of timber received shall be maintained 6.2 Adhesive 6.2 IS 303 IS 848 R One Each lot No testing is required, if accompanied with test certificate or ISI marked. 6.2.1 Extenders 6.2.1 IS 303 IS 1508 S One Each lot 7.2.1 Thickness of veneers 7.2.1 IS 303 R One Each lot - 7.2.3 Grain direction 7.2.3 IS 303 R All - - 7.2.5 Permissible defects 7.2.5.1, 7.2.5.2 7.2.5.3 IS 303 R All

- - 8 Dimensions and Tolerances 8.1, 8.2 and 8.3 IS:303 R 5 For each size from each control unit Samples shall be drawn at regular interval to cover entire production. In case of failure of any sample, entire production shall be checked and only conforming product shall be marked. 9 Workmanship and finish 9.1, 9.2

IS 303 R All - - PM/ IS 303/ 2/ JULY 2020 6 11.2.1 Water Resistance Test 11.2.1 IS 303 IS 1734 (Part 5) R One Each control unit In case of failure, twice the number of samples from same control unit shall be tested and control unit shall be accepted if retested samples found passing. 11.2.2 Mycological Test 11.2.2 IS 303 IS 1734 (Part 7) R One sample in a month from each set of species of timber and each grade of plywood # 11.3 Moisture Content 11.3 IS 303 IS:1734 (Part 1) R One Each control unit In case of failure, twice the number of samples from same control unit shall be tested. Control unit shall be accepted if retested samples found passing. 11.4 Static Bending Strength 11.4 , Table 4 IS 303 IS:1734 (Part 11) R One Each control unit In case of failure twice the number of samples from same control unit shall be tested. Control unit shall be accepted if retested samples found passing. # Samples may be drawn in such a manner that all thickness of plywood manufactured are tested over a period of time. In case of failure of sample in mycological test, a thorough check shall be made about the type of glue used and type of preservative added to the glue.

Note-1: Sub-contracting is permitted to a laboratory recognized by the Bureau or Government laboratories empaneled by the Bureau. Note-2: Levels of control given in column 3 are only recommendatory in nature. The manufacturer may define the control unit/batch/lot and submit his own levels of control in column 3 with proper justification for approval by BO Head. PM/ IS 303/ 2/ JULY 2020 7

Possible Tests in a day (i) Visual defects & Finish (Cl 5.2) (ii) Dimensions & Tolerances (Cl 8) (iii) Moisture Content (Cl. 11.3) (iv) Glue Adhesion - Water Resistance test (Cl 11.2.1) (v) Static Bending Strength (Cl.11.4)